Truck Issues -- Fix It Right the First Time

Model Year(s)

Vehicle Line(s) / Condition

Do This

Don't Do This

Reference Information/Bulletin

2001-04

LB7 Duramax Diesel -- Injector high pressure lines corrodoed

Clean connection area of line and nut of injector high pressure lines as required

Don't replace lines

03-06-04-036A

2007-08

Fullsize utilities --1500 Series -- Power steering fluid leak

Determine source of leak

Don't replace power steering rack

07-02-32-002B

2006-08

Colorado, Canyon, H3 -- Loose module, broken tab under passnger seat

Reattach ECU with 3M two-way tape

Don't replace entire ECU and seat sensing pod assembly

08-08-50-003

2004-07

Colorado, Canyon, H3 -- Reduced power mode, codes

Check battery state of charge and charge or replace as necessary

Don't replace throttle body, throttle body module, accelerator pedal, accelerator position sensor, PCM, or ignition switch

08-06-04-014

2007-08

Silverado, Sierra -- Wet headliner, water leaking past sunroof glass panel seal

Inspect glass panel seal, replace seal

Don't replace sunroof glass panel

PIT 4621

2008

Sierra, Silverado -- SES P1174

Reprogram ECM using TIS2Web

Don't replace catalytic converter, PCM, injector(s), fuel rails, fuel pumps

08-06-04-028

2005-08Trailblazer, 9-7X --Growl, groan, shudder, bind from rear while turningReplace rear differential fluid with DEXRON LS gear oilDon't replace differential gear case08-04-20-0022007-08Acadia, Outlook, Enclave -- A/C compressor noiseReplace HVAC hose with suction lineDon't replace A/C compressor07-01-39-005A2007-08Colorado, Canyon, H3 -- Exhaust rattlePlace hose clamp around forward portion of heat shieldDon't replace exhaust/converter pipe assembly08-06-05-0032001-09All vehicles -- Identifying aftermarket engine calibrationsBlock warranty claim if aftermarket calibration is installedDon't submit warranty claim if aftermarket calibration is installed.

08-06-04-033- Gas

08-06-04-006B - Diesel

2006-07Silverado, Sierra, Savanna, Express, Topkick and Kodiak -- SES light illuminated.Clean EGR motor commutatorDon't replace EGR motor or valve assembly06-06-04-066C