2007.5 + (GMT 900) Non Powertrain--New Body Style--Discussion 07.5 + Topics Not related to the Powertrain, interior, suspensions, body, wheels, tires, ect.
You might want to mention to the dealer that with the rear tires at 80lbs, the tires are inflated to their maximum rated capacity, 6000lbs. If you loaded your truck so that there was 6000lbs on the rear tires, and if you have the 4x4 diesel, there is about 4200 lbs over the front tires. That is a total of 10200lbs, the truck would be overloaded by 1000 lbs.
GM is aware of this issue, and the rear tire pressure should be set to something less, like 66psi. That would be a tire pressure that would allow 5000lbs over the rear axle. This would give a payload capacity of roughly 2600lbs.
If you had a non-diesel, you would have a higher payload capacity, and need higher tire pressures at maximum payload capacity.
These numbers I am using are estimates, but they are probably pretty close.
Seems like when I had the tires ALL set on 58, the light turned off eventually when they warmed up. I think I will just put the tires back at 58 and say **ck it !!
__________________ 2007.5 HD 2500 CREW Z71 LTZ
LMM / ALLY 6 Sp.
PPE Hot, DPF Delete / AFE Stage 2
5 Inch Turbo Back Magnaflow
I believe that there is a 20% (could be 25) tolerance in the TPMS, so a rear tire pressure above 64psi should not turn on the light, and a front above 48psi should be OK. That is for the stock 245/75/16 E tires.
I think it would on the highway but probably not around town.
__________________ Jason 2006 Silverado 2500HD LBZ CC SB Escalade Handles, Front windows tinted to match the rear, painted bumpers, billet grille 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges MBRP Turbo Back Stainless Exhaust (Straight piped), w/ stainless tip! PPE Hot+2 285/75/16 Nitto Terra Grapplers on Gear Alloy wheels ****Lost Kitty Reward if found!! 1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake
Guys in your owners manual it should tell you how to reset and reprogram the tire monitors. On my 07 Trailblazer SS I had to do the same thing..I glanced in the book and BAM there were the instructions. Once you do the learn sequence the computer will learn what ever pressure you are saying is ok. It was also the same with my vette! Might want to check your book!
I know they can change it. I have 35x12.50 on an 18" wheel and they rest mine to 60. My light never comes on and I keep around 55 in.
__________________ 2008 Z71 LTZ Chevy 2500HD LMM motor with a Stage II AFE cold air intake, FASS fuel system, Magnaflow 4" exhaust (still with that stupid DPF), Hypertech flash, Edge Evolution Programmer, Edge Juice w/ Attitude, 6" Pro-Comp lift, 35x12.50 Pro-Comp Xtreme A/T on 18" wheels. Crew cab with limo tint all around including sunroof, tail lights, and tint strip on windshield. Also did the 3M clear bra in front.
When I had my 35" tires put on, I went to the dealership and had them drop my tire pressure sensors to go off at < 40 psi. On cold mornings they start out @ 37 psi and the light goes off after they warm up to 40 psi.
__________________ 2007.5 GMC SIERRA 2500HD Duramax/Allison
6" Superlift, 35" Toyo Open Country M/T
18" Moto Metal 955's
MBRP DPF-Back Performance Exhaust
Line-X Bed, Line-X Rocker Panels
Amp Research Bed Step, Westin Bull Bar w/ KC's
GOOOOOOO DAWGS!!! SIC EM!!! ROOOF!!! ROOOF!!! ROOOF!!! ROOOF!!! ROOOF!!!
SEND THAT 88 CAR @!!! GO JR!!!
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