redwngr

Much better way of saying than my long winded reply...

Maybe in 15 years playing with the hummerEV they'll learn enough for mass market pickups.

I'm a little confused. Thread title suggests truck is 4wd, but with the transfer case that doesn't have 4LO. Post indicates it's a 2wd. My usage is farm/rural, and including running through snow - sometimes unplowed, sometimes drifted back in, so I do find situations where I use 4wd. 25 years running 4wd pickups and I don't think I've ever 'needed' 4LO. Last few truck I haven't even bothered to test and see if 4LO would engage... FWIW, I'm also not a fan of and don't use the 'autotrac' automatic 4wd mode that has been available on 1500's for a few years, and is available on HDs starting with the 2020's . 4wd HD's transfer cases are all 2 speed units - one with autotrac and one traditional.

The details are all in the 3.0L diesel supplement. If your paper one is missing, a pdf can be downloaded from GM. The 'bleed' procedure is just a matter of cycling the ignition. No hand pump like the older 6.6's and not crackinginjectors etc like the old mechanical injection systems. This includes diagrams and info in addition to what is in the diesel supplement. https://gm-techlink.com/?p=12232

In 2020 model year RPO JGD would be 10,450 gvwr JGD GVWR, 10,450 lbs. (4740 kg) 1 - Included and only available with CK20743 model and (L8T) 6.6L V8 gas engine with 17" wheels or CK20903 model and (L8T) 6.6L V8 gas engine with 18"or 20" wheels. Available on WT and LT CK - chev 4wd 20 -2500 7 -standard box 43 - crew 9 - long box 03 - reg cab

Did you try a standard cord? EDIT: So I got curious and went out and got the cord from my truck. I had been thinking that the picture was the plug (or like the plug) on the truck.... Clearly it isn't like a standard plug, and clearly a 'standard' cord will not mate with the truck.

There might be hints here: https://gm-techlink.com/?p=12721 Trailering App Trailer Connection and Lighting Diagnosis Update February 27, 2020 The new trailering app (RPO U1D) (Fig. 23) available on the 2019-2020 Silverado 1500 and Sierra 1500 and the 2020 Silverado HD and Sierra HD uses the K68 Trailer Lighting Control Module (TLCM), or Trailer Interface Module, to constantly monitor for trailer connection status, trailer lighting faults, and trailer theft deterrent purposes through the lighting circuits of the trailer. Fig. 23 Trailer Connection Status When a trailer is connected, the Trailer Lighting Control Module senses the trailer connection using the lighting circuits of the trailer and alerts the driver by requesting a trailer profile setup through the trailering app on the infotainment screen (P17 Info Display Module). (Fig. 24) The Trailer Detection Alert setting must be enabled for the alert to display when a trailer is connected. Fig. 24 With a trailer connected and the ignition off, the Trailer Lighting Control Module will periodically pulse the lighting circuits of the trailer to verify it is still connected. Depending on the configuration of the trailer lights, the trailer lights may periodically flash as part of the trailer connection detection or theft deterrent functions. These flashes may be more visible in dark ambient light environments and correspond to when the Trailer Lighting Control Module pulses the lighting circuits to ensure the trailer is still connected. (Fig. 25) TIP: The flashing or flickering lights is a normal condition and this operation should be explained to the customer when a vehicle is brought to the dealership for a flickering/flashing lights condition. GM is receiving CCND warranty claims for this condition and it should not be charged through warranty. Fig. 25 Depending on the settings, a Trailer Connected or No Trailer Connected status may be displayed by the trailering app on the infotainment screen. (Fig. 26) TIP: Trailer disconnection detection by the Trailer Lighting Control Module requires that a trailer light circuit must be activated after the trailer is disconnected. If a trailer is disconnected while no trailer lights are active, the trailer will continue to be reported as connected by the trailering app. Always have the vehicle lights on when disconnecting the trailer to ensure the system properly detects the disconnection. Other causes that may result in a trailer not being detected include poor trailer wiring or a poor connection at the trailer connector. It may be necessary to update the trailer wiring, trailer connector, or trailer lights. Fig. 26 Trailer Brake System The available Trailer Brake System with an Integrated Trailer Brake Control (Fig. 27) and the trailering app both report trailer connection information. However, the Trailer Brake System and related DIC messages are independent from the Trailer Lighting Control Module trailer connection detection system that feeds the trailering app on the infotainment screen. Fig. 27 If the truck is equipped with a Trailer Brake System, a Trailer Brakes Connected message will display on the Driver Information Center (DIC) when a trailer with electric trailer brakes is connected. In addition, this system will display Check Trailer Wiring on the DIC every time a trailer with electric brakes is disconnected. Trailer Disconnected Message On some 2019 Silverado 1500 and Sierra 1500 models only, a “Trailer Disconnected, Check Connection” message may display on the DIC without a trailer being connected. (Fig. 28) If the Trailer Lighting Control Module on 2019 models detects enough of a load on any of the trailer tail lamps or stop/turn signal circuits, it may determine that a trailer has been connected. However, any moisture or corrosion in the trailer receptacle or Trailer Lighting Control Module connector, or anything left plugged into the trailer receptacle, such as trailer adapters with built-in test LEDs, may cause the module to think that a trailer is connected. Fig. 28 If this condition is found, remove anything plugged into the trailer receptacle and inspect for any moisture or corrosion in the trailer receptacle at the rear bumper, the available receptacle for when towing a 5th wheel trailer, the chassis harness connector that plugs into the trailer receptacle, and the Trailer Lighting Control Module connector. (Fig. 29) Clean and repair any connection issues. Fig. 29 Trailer Lighting For lighting operation, the Trailer Lighting Control Module receives serial data messages from the Body Control Module (BCM) indicating which lamps have been activated on the vehicle. The Trailer Lighting Control Module responds by applying voltage to the appropriate control circuits for the requested lamps to illuminate the lamps on the attached trailer. The Trailer Lighting Control Module constantly monitors the trailer’s reverse, park, and left and right stop/turn signal lamps. 2019 model year vehicles equipped with a Trailer Lighting Control Module cannot drive as much current on each circuit when compared to the non-Trailer Lighting Control Module trailer lighting system. The Trailer Lighting Control Module drives four trailer circuits using four solid state drivers that are fed from one 30A lighting fuse. If the total current on the four circuits overloads the fuse, it will fail. If any single lighting circuit exceeds the driver threshold, it will deactivate the output for the balance of the key cycle and a reactivation of the lamp load is required. Individual DTCs are activated for each circuit and that load is turned off due to high current. If a trailer draws too much current, it may be helpful to change some or all of the trailer lighting to LEDs. TIP: For 2020 model year vehicles, the trailer park lamps amperage capability has been increased and can handle electrical loads up to 16 amps. The park lamp circuit has been moved from terminal 5 to terminal 25 and is driven by an internal relay that allows for higher amperage values for the parking lamps. The park lamp circuits are not used for trailer connection detection on 2020 models. Trailer Lamp Test Lights A test light or trailer circuit tester may not create enough load to be seen or sensed by the Trailer Lighting Control Module and the trailer lighting outputs will not be activated. If a tester draws enough load on one or more of the trailer lighting circuits, the Trailer Lighting Control Module will determine that a trailer is connected and enable the trailering light circuits (when activated on the vehicle). A single LED may or may not draw enough current to be sensed by the Trailer Lighting Control Module. The available EL-52641 Trailer Presence Simulator Tester tool provides feedback on the vehicle signals sent to the trailer for the reverse lights, battery power, right turn signal and brake light, left turn signal and brake light, and brake controller output. Trailering App Profiles When a trailer is connected, the driver has the option of selecting a Guest profile or naming the trailer and storing settings for it on the trailering app. The settings can include basic information — profile name, hitch type and trailer type — or more advanced information — Tow/Haul Mode reminder, Trailer Tire Pressure, and maintenance reminders. (Fig. 30) Fig. 30 If the trailering app is set up incorrectly for the connected trailer, several DTCs or DIC messages may appear. For example, if a trailer does not have any reverse circuit loads, yet a reverse circuit load is expected in the trailering app, the Trailer Lighting Control Module will set DTC B3890 (Trailer Backup Lamps Circuit) and messages may be displayed on the DIC and infotainment screen. If the trailer does not have reverse lamps or any loads on the reverse circuit, change the trailering app profile settings and clear any DTCs. Do not replace the Trailering Lighting Control Module.

I likely does a check to verify it is connected to a trailer with brakes before it sends out 'brake' voltage/current. Checking pinouts with a meter and no trailer connected wouldn't satisfy that type of check. Are you getting a 'trailer connected' message after it's plugged in? Are you able to set up a trailer profile for it in the trailering app?

We know they don't all leak. Best plan might be to find out where the oil is coming from before deciding major surgery is necessary.

Somebody 15 years ago said battery operated power tools will never be good enough to replace most air and corded electric ones in shops, garages and building sites everywhere...

Antenna connected and snugged up? (they sometimes get removed when on car lots or when taken thru a carwash)

Wait to long and you could run into restrictions on availability of options/trims etc for the balance of the MY. Might be more restrictions than usual this year, since interior changes are expected for 2022 model.

Interior colour availability also depends on trim level. Gideon / Very Dark Atmosphere (HV5 -cloth, HVC leather) is not available on all chev trims either. On sierra 1500 HV5 (cloth and called Dark walnut/Slate) is only available on 3SA (SLE). It's not offered with the HVC leather version of that colour. FWIW, AT4 and Denali each have there own only interior available (HVD Jet Black with Kalahari accents on AT4, HVH - Dark Walnut/Dark Ash Grey on Denali ). Jet Black seems to be available on all most trims except AT4.. There is a long list of SEO colours -- which are the colours often seen on fleets - construction, national parks, etc etc. They need a a minimum number of vehicles before that will paint any of those colours. You MIGHT get lucky and be able to piggy back on a fleet order. I wouldn't hold your breath. Some of the 'normal' colours are limited by trim level. (and chev/gmc often, but not always use a different name for the same paint code/colour) Denali colours usually include at least one 'Denali only' colour Current Examples: Brownstone Metallic GNK not available on AT4 or Denali. Hunter Metallic GED - only on Denali Shadow Gray Metallic GJI - not available on HC Iridescent Pearl Tricoat G1W -- not available on 1WT, Custom or Custom Trail Boss models. 'Normal' Colours are in the brochure https://www.chevrolet.com/content/dam/chevrolet/na/us/english/index/shopping-tools/download-catalog/02-pdf/2020-chevrolet-silverado-1500-catalog-v2.pdf GMC has similar

I believe the 'no mechanical differences' is correct. For legal issues the sticker is still the limit. (which probably matters more for commercial uses than for recreational use) It's an 'elective' limit that has to do with licensing/insurance in some areas - including annual inspection requirements.

If it's arcing and starts a fire, that will be alot more hassle than taking it in to get repaired....

KW7 Alternator, 170 amps 1 - Requires (L8T) 6.6L V8 gas engine. KW5 Alternator, 220 amps 1 - Included with (L5P) Duramax 6.6L Turbo-Diesel V8 engine or (VYU) Snow Plow Prep/Camper Package. Free flow on (L8T) 6.6L V8 gas engine. KHF Alternators, dual, 220-amps primary, 170-amps auxiliary 1 - With (L8T) 6.6L V8 gas engine, (K4B) 730 cold-cranking amps/70 Amp-hr auxiliary battery is required. Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power 1 - Included and only available with (L8T) 6.6L V8 gas engine. Battery, heavy-duty dual 730 cold-cranking amps/70 Amp-hr, maintenance-free with rundown protection and retained accessory power 1 - Included and only available with (L5P) Duramax 6.6L Turbo-Diesel V8 engine. K4B Battery, auxiliary, 730 cold-cranking amps/70 Amp-hr 1 - Requires (L8T) 6.6L V8 gas engine and either (KW5) 220-amp alternator or (KHF) dual alternators. Not available with (KW7) 170-amp alternator.

Depends on how the truck is ordered. 2020 2500 C7A GVWR, 10,000 lbs. (4536 kg) Sierra - Available to all models with L8T Gas Engine. L5P Diesel requires TK20*53 or T*20*43 models. L5P Diesel Not Available with TC20743 or any Regular Cab models. SLE - Available to all models with L8T Gas Engine. L5P Diesel requires TK20*53 or T*20*43 models. L5P Diesel Not Available with TC20743 or any Regular Cab models. When ordered with (ZW9) pickup bed delete, includes hard touch instrument panel-top pad. SLT - Available to all models with L8T Gas Engine. L5P Diesel requires TK20*53 or T*20*43 models. L5P Diesel Not Available with TC20743. When ordered with (ZW9) pickup bed delete, includes hard touch instrument panel-top pad. AT4 - Available Denali - Not available with (YF5) or (NE1) emissions. JGF GVWR, 10,650 lbs. (4831 kg) All trims - Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18" or 20" wheels or TK20943 and (L8T) 6.6L V8 gas engine with 17" wheels. JGH GVWR, 10,850 lbs. (4921 kg) All trims - Included and only available with TK20943 model and (L8T) 6.6L V8 gas engine with 18" or 20" wheels. JGL GVWR, 11,350 lbs. (5148 kg) All trims - Included and only available with TK20743 model and (L5P) Duramax 6.6L Turbo-Diesel V8 engine with 18" or 20" wheels or TK20943 model and (L5P) Duramax 6.6L Turbo-Diesel V8 engine with 17" wheels. JGN GVWR, 11,550 lbs. (5239 kg) All trims - Included and only available with TK20943 model and (L5P) Duramax 6.6L Turbo-Diesel V8 engine with 18" or 20" wheels.

Do the blinker red leds in the mirrors work? Do you know if the truck came from the factory with those mirrors installed? Many trucks had the mirrors changed/upgraded. RPO code should be DQS for trailer mirrors with backup lights on the higher trims with the K2 body style. Check the rpo code label in the glovebox and see if you can find that one. If your 16 LTZ came with regular mirrors you will likely find DL8 If you still don't have the mirror functioning as desired, reach out to member pgamboa (the Harness Dr) Also check out this thread -

2021 2500 4wd crew stb box overall height - 79.82 (2027) 2019 2500 4wd crew std box overall height - 78.23 (1987) I'm not sure how the step-in height compare. The 2021 1500 4wd crew std box overall height - 75.4 (1915)

Are they still making crewcabs only?

I'd probably just reset it. Drive it the same amount for another year and it will 'remind' you again.

They can likely make the 3rd stop light work, but perhaps the problem is the camera(s) in the CHMSL.....?

Standard steering column by trim, no options/upgrades listed WT, Custom, Custom_TB N33 Steering column, Tilt-Wheel, manual with wheel locking security feature LT, RST, LT_TB, LTZ, HC N37 Steering column, manual tilt and telescoping Convenience package on Custom and CTB PCX Custom Convenience Package, includes (BTV) Remote Start with (UTJ) content theft alarm, (C49) rear-window defogger, (UF2) bed LED cargo area lighting and (QT5) EZ Lift power lock and release tailgate

Ford's electric truck coming mid '22: https://insideevs.com/reviews/377328/ford-f150-electric-truck-details/

15 years, so I figure we'll see at least 2 more generations.