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Say When

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About Say When

  • Birthday 03/27/1953

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  • Name
    David McNulty
  • Location
    Allen, Texas
  • Gender
  • Drives
    Black-on-Black 2020 GMC 2500HD SLE CC LB 4WD L8T Gas

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Enthusiast (2/11)



  1. 2020 Onyx Black-on-Jet Black GMC Sierra 2500HD SLE Crew Cab - Cloth Front Bucket Seats - Long Box - 4Wheel Drive - "L8T" Gas Moto Metal 20"x9" wheels with +18mm offset: Model MO993 HYDRA Part# MO99329088218 Chrome eight point star, deep lip design with red inserts BFGoodrich T/A KO2 285/65R20 127S E1 BSW tires N-FAB podium stainless steel side steps: Part# #HPC1980CC-SS Highway Products truck bed rails
  2. GM-Trucks.com Members: My 2020 GMC 2500HD came from the factory with 17-inch wheels & tires. I replaced them with 20-inch wheels & tires. My WAZE navigation app shows a ~5-mph difference with my speedometer. Can GMC mechanics re-program my speedometer for 20-inch wheels & tires? Also, are my tire pressure sensors calibrated for my factory 17-inch wheels & tires? Do my tire pressure sensors also need to be re-calibrated for my 20-inch wheels & tires? Thank you in advance for any guidance you can offer. Much obliged.
  3. https://www.highwayproducts.com/p/truck-bed-rails/
  4. On two occasions since I took delivery on 02/14/20, the batteries in my 2020 GMC Sierra 2500HD SLE Crew Cab, Long Box, 4WD, L8T Gas Engine truck have inexplicable gone dead. My truck is equipped with optional Dual Alternators and 220-amp Primary Battery & 170-amp Auxiliary Battery. I have not identified the source of the battery drain. Has this phenomenon happened to any other GM-Trucks.com members? Can anyone offer any advice on how to diagnose the problem? Much obliged & kind regards.
  5. I returned Great Day Center-Lok Overhead Gun Rack model CL1501 (for i Rifle) because I was afraid it would interfere with side air bags.
  6. A 13-14% discount off MSRP is the near the lowest I’ve heard about.
  7. I have 285/65R20 BFG KO2 tires with Moto Metal 20x9 +18 wheels on my stock 2020 GMC Sierra HD with no problems.
  8. You’re right! That’s why I had to purchase Vehicle Mount Adapter (model GCC-UVHHMA).
  9. In my black-on-black 2020 GMC 2500HD SLE CC LB 4WD L8T gas engine truck: I purchased & installed this handy $73.15 Gum Creek Vehicle Handgun Holster Model GCC-UVHHM-15-GC with Size 15 Holster & optional Vehicle Mount Adapter Model GCC-UVHHMA. http://www.gumcreekcustoms.com/Vehicle-Handgun-Mount-p8.html In the Vehicle Handgun Holster is my 1993 Smith and Wesson Model 442 Airweight .38 Special revolver sporting hand-cut & polished green Kirinite Eagle Grips. Its a BADASS rig! Check it out:
  10. GM-Trucks.com Members: Have any of you installed the Great Day Center-Lok Overhead Gun Rack for Trucks in a 2020 GMC Heavy Duty truck? http://greatdayinc.com/products/truck-auto-jeep-accessories/center-lok-overhead-gun-rack-for-trucks/ If yes, please share your evaluation of the fitment. Much obliged. Kind regards. 04/05/20 Update: No responses. So I ordered the Great Day Center-Lok Overhead Gun Rack model CL1501 (for i Rifle). Upon receipt, I will post a fitment evaluation.
  11. I’m damn sure my badass black-on-black 2020 GMC Sierra 2500HD SLE CC LB 4WD 6.6L V8 L8T Gas Engine is rare! Factory Installed Options: SEATS, FRONT BUCKET WITH CENTER CONSOLE GOOSENECK/5TH WHEEL PACKAGE TRAILERING MIRRORS, OUTSIDE HEATED, POWER- ADJUSTABLE, AUTO-DIMMING, W/TURN INDICATORS ONYX BLACK DUAL ALTERNATORS, 220 AMPS PRIMARY & 170 AMPS AUXILIARY ENGINE BLOCK HEATER BATTERY, AUX TWO-SPEED TRANSFER CASE W/ AUTOTRAC GMC PROTECTION PACKAGE (DEALER INSTALLED) PREFERRED PACKAGE SLE VALUE PACKAGE DRIVER ALERT PACKAGE I TRAILER TIRE PRESSURE MONITOR SYSTEM MULTIPRO TAILGATE WHEEL LOCKS (DEALER INSTALLED) BED VIEW CAMERA REAR UNDERSEAT STORAGE (DEALER INSTALLED) POLISHED EXHAUST TIP (DEALER INSTALLED) X31 OFF-ROAD PACKAGE SLE VALUE PACKAGE DISCOUNT UPFITTER SWITCHES (5) (CUSTOMER RESPONSIBLE FOR INSTALLATION) Aftermarket Options: Moto Metal 20"x9" Wheels with 18mm Offset: Model MO993 HYDRA Part# MO99329088218 BFGoodrich T/A KO2 285/65R20 127S E1 BSW Tires N-FAB Podium Stainless Steel Side Steps: Part# #HPC1980CC-SS Highway Products Truck Bed Rails Putco Blade LED Light Bar B&W TS20067BMP Tow & Stow for GMC Multi-Pro Tailgate 2.5” Shank, 1-7/8" x 2” x 2 5/16” Balls 7" Drop Let's Go Aero SHP2040-XL New Press-On Locking 2.5in Receiver Great Day Center-Lok Overhead Gun Rack Gum Creek Vehicle Handgun Mount (model GCC-UVHHM-15-GC) including Size 15 Holster & Vehicle Mount Adapter (model GCC-UVHHMA)
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