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redwngr

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redwngr last won the day on March 15 2016

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About redwngr

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  1. The DEF gauge is NOT a simple variable gauge like a fuel gauge. It also blends in an estimate of the remaining range (like the range estimate for fuel in the dic). The only way to know miles per def gallon is to fill it, drive it for a few thousand and refill it. Just like a hand-calc for fuel mileage. https://gm-techlink.com/?p=13143 Diesel Exhaust Fluid Consumption May 21, 2020 The diesel engines (RPOs LWN, LM2, L5P, L5D) available on 2020 Colorado, Express, Silverado 1500, Silverado 2500HD/3500HD, Silverado 4500HD/5500HD/6500HD, Canyon, Savana, Sierra 1500, and Sierra 2500HD/3500HD models use Diesel Exhaust Fluid (DEF) (Fig. 1) in order to reduce the exhaust Oxides of Nitrogen (NOx) levels within the Selective Catalyst Reduction stage of the exhaust aftertreatment system. A series of driver prompts and warnings are initiated when the DEF level falls below a calibrated value. Fig. 1 Segmented DEF Level Gauge The current 2020 Silverado 1500 and Sierra 1500 models have a DEF level gauge on the instrument cluster that provides drivers with a representation of how much DEF is in the DEF tank up. (Fig. 2) The DEF level gauge does not operate like a typical float-style gauge that is used in a fuel tank. The Engine Control Module (ECM) monitors the DEF level and consumption rate in order to calculate an estimated range. DEF levels are detected by the DEF level sensor. Fig. 2 There may be some fluctuation in the amount of DEF represented on the DEF level gauge. After filling the DEF tank, it may take a few key cycles to register the correct amount in the DEF tank. With the new segmented DEF level gauge, it is possible that after adding 5 gallons (18.9 L) of DEF that the gauge reads as a full tank after the fill event. However, if the actual level of DEF is just entering the last segment on the gauge, the gauge is likely to drop by one segment shortly after driving after the fill event. As a result, a driver could have an initial impression that the vehicle consumes an excessive amount of DEF. Emissions Requirements Every year, GM produces diesel engines that continue to meet aggressive federal requirements to reduce Nitrogen Oxides (NOx) in the vehicle exhaust. As DEF is required to reduce the NOx in the exhaust, DEF consumption will increase as NOx reduction requirements increase. Customer trading in an older model year diesel vehicle for a newer model year vehicle will likely see an increase in DEF usage. DEF consumption increases as the newer vehicles meet the more stringent emission requirements for that model year. The amount of DEF consumed also is a function of how hard the engine is working, or engine load. Due to engine use, it is more representative to compare DEF consumption to the amount of fuel consumed – also a function of engine load – instead of miles traveled. In addition to engine load, other factors that affect the DEF usage rate are the humidity, temperature, and altitude where the vehicle is operating. Under certain conditions, the ECM will increase or decrease the amount of DEF used based on learning or adaptive algorithms. In the event of a malfunction and Check Engine light, the ECM may double or even eliminate the amount of DEF that is being used. An improper amount of DEF use will continue until the vehicle is repaired and the learned value in the ECM is reset.
  2. And it's a 'Denali 'only' colour, which is that info was included in the post.
  3. Colours in those posts were just the ones that changed for 2021. These are 2021 HD colours: (names are the GMC ones, Chev will have the same RPO codes, but often uses different names.) As per usual, Chev does not use the the 'Denali only' colours White Frost Tricoat G1W Cardinal Red G7C Pacific Blue Metallic GA0 Quicksilver Metallic GAN Summit White GAZ Onyx Black GBA Carbon Black Metallic GCI Brownstone Metallic GNK NEW! Ebony Twilight Metallic GB8 NEW! Cayenne Red Tintcoat GSK NEW! Hunter Metallic GED Most are 'extra charge'. Some are not available on all trims. White Frost - Not available with (4SB) AT4 Trim. Cardinal Red - Not available on (4SB) AT4 or (5SA) Denali. Carbon Black Metallic - Not available after December 2020. Requires (5SA) Denali. Brownstone Metallic - Not available on (5SA) Denali. Ebony Twilight Metallic - Required with (JSE) Denali Black Diamond Edition. Hunter Metallic - Requires (5SA) Denali. Not available until January 2021.
  4. For 2021, Wireless Phone Projection, for Apple CarPlay and Android Auto is standard on LTZ and HC. Z45 Suspension, Adaptive Ride Control On HC - Required and only available with (PDM) High Country Deluxe, (RVA) 22" x 9" polished aluminum wheels or 22" LPO wheels. PDM High Country Deluxe, includes (PDJ) Safety Package II, (CF5) power sunroof, (RVA) 22" polished aluminum wheels, (XCE) 275/50R22SL all-season, blackwall tires and (RIA) floor liner, LPO On HC - Requires (Z45) Adaptive Ride Control. Not available with (Z71) Z71 Off-Road Package. (RVA) 22" polished aluminum wheels may be upgraded to (SEV) 22" 6-spoke Low Gloss Black wheels with machined accents, LPO, (SEW) 22" 5-spoke Dark Silver aluminum wheels with Chrome, LPO, (SF0) 22" Bright Chrome wheels, LPO or (SGM) 22" High Gloss Black wheels, LPO. Looks like Adaptive Ride control requires PDM, which is not available if Z71 was ordered. (so it seems 'fully loaded' still has choices...)
  5. Same deal with the 'burb and Tahoe. Z71 is 5.3 only. 6.2 is only available in the HC.
  6. OM says 87 for all gasoline engines except the 6.2 which it recommends 93.
  7. No, but the dealers can price and accept orders for the 2021's. Even if you decide to buy something currently at a dealer, be sure to check out the advertising on the trailering feature improvements for 2021's to see if any of them are important to you. Nothing worse that having one home for few weeks and then finding out the there is some desirable feature that was available a few weeks after the purchase.
  8. The def indicator is also trying to estimate range remaining - so 'recent' rate of usage is included in the estimate. Similar to the 'range' estimate for fuel. DEF usage is a percentage of fuel usage, so when fuel usage is unusually high so is def usage. Up and down the Loveland Pass means big swings in usage. The combo of 'level' and 'range' indicator certainly seems to be causing concern for many operators. Be sure to read the section about the DEF gauge: https://gm-techlink.com/?p=13143 Diesel Exhaust Fluid Consumption May 21, 2020 The diesel engines (RPOs LWN, LM2, L5P, L5D) available on 2020 Colorado, Express, Silverado 1500, Silverado 2500HD/3500HD, Silverado 4500HD/5500HD/6500HD, Canyon, Savana, Sierra 1500, and Sierra 2500HD/3500HD models use Diesel Exhaust Fluid (DEF) (Fig. 1) in order to reduce the exhaust Oxides of Nitrogen (NOx) levels within the Selective Catalyst Reduction stage of the exhaust aftertreatment system. A series of driver prompts and warnings are initiated when the DEF level falls below a calibrated value. Fig. 1 Segmented DEF Level Gauge The current 2020 Silverado 1500 and Sierra 1500 models have a DEF level gauge on the instrument cluster that provides drivers with a representation of how much DEF is in the DEF tank up. (Fig. 2) The DEF level gauge does not operate like a typical float-style gauge that is used in a fuel tank. The Engine Control Module (ECM) monitors the DEF level and consumption rate in order to calculate an estimated range. DEF levels are detected by the DEF level sensor. Fig. 2 There may be some fluctuation in the amount of DEF represented on the DEF level gauge. After filling the DEF tank, it may take a few key cycles to register the correct amount in the DEF tank. With the new segmented DEF level gauge, it is possible that after adding 5 gallons (18.9 L) of DEF that the gauge reads as a full tank after the fill event. However, if the actual level of DEF is just entering the last segment on the gauge, the gauge is likely to drop by one segment shortly after driving after the fill event. As a result, a driver could have an initial impression that the vehicle consumes an excessive amount of DEF. Emissions Requirements Every year, GM produces diesel engines that continue to meet aggressive federal requirements to reduce Nitrogen Oxides (NOx) in the vehicle exhaust. As DEF is required to reduce the NOx in the exhaust, DEF consumption will increase as NOx reduction requirements increase. Customer trading in an older model year diesel vehicle for a newer model year vehicle will likely see an increase in DEF usage. DEF consumption increases as the newer vehicles meet the more stringent emission requirements for that model year. The amount of DEF consumed also is a function of how hard the engine is working, or engine load. Due to engine use, it is more representative to compare DEF consumption to the amount of fuel consumed – also a function of engine load – instead of miles traveled. In addition to engine load, other factors that affect the DEF usage rate are the humidity, temperature, and altitude where the vehicle is operating. Under certain conditions, the ECM will increase or decrease the amount of DEF used based on learning or adaptive algorithms. In the event of a malfunction and Check Engine light, the ECM may double or even eliminate the amount of DEF that is being used. An improper amount of DEF use will continue until the vehicle is repaired and the learned value in the ECM is reset.
  9. 2021 2500 order guide SF6 LPO, Body color wheel arch moldings, (dealer-installed) 1 - Requires exterior paint (GAZ) Summit White, (GBA) Onyx Black, (GSK) Cayenne Red Tintcoat or (GAN) Quicksilver Metallic. Not available with (ZW9) pickup bed delete, (VQK) front and rear Black molded splash guards, LPO or (PDH) GMC Interior Protection Package, LPO. 2 - Requires exterior paint (GAZ) Summit White, (G1W) White Frost Tricoat, (GBA) Onyx Black, (GSK) Cayenne Red Tintcoat or (GAN) Quicksilver Metallict. Not available with (ZW9) pickup bed delete, (VQK) front and rear Black molded splash guards, LPO or (PDH) GMC Interior Protection Package, LPO. 3 - Requires exterior paint (GAZ) Summit White, (GBA) Onyx Black or (GSK) Cayenne Red Tintcoat. Not available with (VQK) front and rear Black molded splash guards, LPO or (PDH) GMC Interior Protection Package, LPO. 4 - Requires exterior paint (GAZ) Summit White, (G1W) White Frost Tricoat, (GBA) Onyx Black, (GSK) Cayenne Red Tintcoat, (GAN) Quicksilver Metallic or (GCI) Carbon Black Metallic. Not available with (VQK) front and rear Black molded splash guards, LPO or (PDH) GMC Interior Protection Package, LPO. 1, 2, 3, and 4 are trim levels - SLE, SLT, AT4 and Denali They show not available on base Sierra.
  10. ECM can/does raise idle for several reasons: From Duramax supplement: Under certain conditions the engine idle speed can vary or be elevated. Change in idle speed is normal and does not indicate a problem. Normal conditions that can raise idle speed are low voltage, DPF regeneration, air conditioning compressor loads, and engine warmup. These speeds can range from approximately 600 to 1000 rpm.
  11. They keep bumping up the size of standard and available alternators. 2020 HD's the standard alternator is 170A on gas, 220A on diesel (up from 150A standard on all HD engines in 2019) KW7 Alternator, 170 amps --- Requires (L8T) 6.6L V8 gas engine. KW5 Alternator, 220 amps Trims other than custom -- 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. On Custom - Included with (VYU) Snow Plow Prep/Camper Package. KHF Alternators, dual, 220-amps primary, 170-amps auxiliary On Trims other than custom - Requires (K4B) auxiliary battery with (L8T) 6.6L V8 gas engine. On Custom - Requires (K4B) auxiliary battery.
  12. Thanks. Didn't know that one! (the others are straight from the list in the OM's.) And it doesn't it matter if tow/haul is engaged? Might have to 'borrow' swmbo's ride and check it out.
  13. The folks selling 'insurance' would not be in business if they weren't making a profit, even after paying commissions to the dealers and sales people. My argument is that you're not going to have every vehicle and appliance have a failure that has a cost that exceeds the cost of extended insurance. The ones that don't have failures cover the costs of those that do. Exactly what the companies selling insurance are counting on to happen -- or they won't be in business when you go to collect. The profit from the insurance might as well be in your pocket. OTOH, if spending the extra money makes you happy, or makes you sleep at night -- go for it. But don't forget that the dmax powertrain warranty is a lot longer than the bumper to bumper (and also longer than the gasser powertrain warranty)
  14. Several of the items on the list are easy to test.
  15. The Terrain also has a list of conditions that will cause it not to stop. Perhaps you've not been in it when one of the conditions was present? What year is the Terrain? Online 2019 Terrain owners manual shows the same list of conditions as the cut-and-paste from the Sierra manual that was posted above.
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