GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ

I'm looking for threads from this forum to fill this. I've started looking through the posts in this forum starting with the oldest. There are over 100 pages and the builds section to look through so it'll take me some time.

I will occasionally move or delete user posts from this thread to keep it un-cluttered.
If you don't want your comments to be ruthlessly pruned :lol: the FAQ Discussion is in this thread. http://67-72chevytrucks.com/vboard/s...d.php?t=805893

The following are GMT800 series light trucks.

• 1999-2006 Chevrolet Silverado & GMC Sierra
• ........2007 Chevrolet Silverado Classic & GMC Sierra Classic
  Non trivial body, interior, and electrical revisions were implemented in the model year 2003 and newer Sierra and Silverado.
• 2000-2006 Chevrolet Tahoe, GMC Yukon, & Chevrolet Suburban
• 2002-2006 Chevrolet Avalanche
• 2002-2006 Cadillac Escalade
• 2002-2009 Hummer H2
• 2003-2014 GMC Savana and Chevrolet Express Fullsize vans. While not GMT800 series these fullsize vans are used as commercial delivery and service vehicles and are sisters to the light trucks. Just as the older G & P series vans were with the T400 & earlier CK series light truck lines.

VIN number info

• http://67-72chevytrucks.com/vboard/s...d.php?t=483883
• 1960-2020 Genuine GM Parts VIN Cards PDF

GM T800 Upfitter guides

• 2000-2013:https://www.gmupfitter.com/pdflists/view/6
  These upfitter guides are intended for fleet equipment installers or "upfitters" they include electrical and other information not easily accessible or not available at all in the GM service manuals.

GM T800 series Owners Manuals

Chevrolet Silverado

• 1999_Chevrolet_Silverado_Owners.pdf
• 2000_Chevrolet_Silverado_Owners.pdf
• 2001_Chevrolet_Silverado_Owners.pdf
• 2002_Chevrolet_Silverado_Owners.pdf
• 2003_Chevrolet_Silverado_Owners.pdf
• 2004_Chevrolet_Silverado_Owners.pdf
• 2005_Chevrolet_Silverado_Owners.pdf
• 2006_Chevrolet_Silverado_Owners.pdf
• 2007_Chevrolet_Silverado_Classic_Owners.pdf

GMC Sierra

• 1999 GMC Sierra Owners.pdf
• 2000 GMC Sierra Owners.pdf
• 2001 GMC Sierra Owners.pdf
• 2002 GMC Sierra Owners.pdf
• 2003 GMC Sierra Owners.pdf
• 2004 GMC Sierra Owners.pdf
• 2005 GMC Sierra Owners.pdf
• 2006 GMC Sierra Owners.pdf
• 2007 GMC Sierra Classic Owners.pdf

Chevrolet Avalanche

• 2002 Chevrolet Avalanche Owners
• 2003 Chevrolet Avalanche Owners
• 2004 Chevrolet Avalanche Owners
• 2005 Chevrolet Avalanche Owners
• 2006 Chevrolet Avalanche Owners

Chevrolet Tahoe Suburban

• 2000 Chevrolet Tahoe Suburban Owners.pdf
• 2001 Chevrolet Tahoe Suburban Owners.pdf
• 2002 Chevrolet Tahoe Suburban Owners.pdf
• 2003 Chevrolet Tahoe Suburban Owners.pdf
• 2004 Chevrolet Tahoe Suburban Owners.pdf
• 2005 Chevrolet Tahoe Suburban Owners.pdf
• 2006 Chevrolet Tahoe Suburban Owners.pdf

Cadillac Escalade

• 2002 Cadillac Escalade Owner Manual
• 2003 Cadillac Escalade Owner Manual
• 2004 Cadillac Escalade Owner Manual
• 2005 Cadillac Escalade Owner Manual
• 2006 Cadillac Escalade Owner Manual

Hummer H2

• 2003 Hummer H2
• 2004 Hummer H2
• 2005 Hummer H2
• 2006 Hummer H2
• 2007 Hummer H2
• 2008 Hummer H2
• 2009 Hummer H2

Chevrolet Express Van

• 2003 Chevrolet Express Van Owner Manual
• 2004 Chevrolet Express Van Owner Manual
• 2005 Chevrolet Express Van Owner Manual
• 2006 Chevrolet Express Van Owner Manual
• 2007 Chevrolet Express Van Owner Manual
• 2008 Chevrolet Express Van Owner Manual
• 2009 Chevrolet Express Van Owner Manual
• 2010 Chevrolet Express Van Owner Manual
• 2011 Chevrolet Express Van Owner Manual
• 2012 Chevrolet Express Van Owner Manual
• 2013 Chevrolet Express Van Owner Manual
• 2014 Chevrolet Express Van Owner Manual

GMC Savana Van

• 2003 GMC Savana Van Owner Manual
• 2004 GMC Savana Van Owner Manual
• 2005 GMC Savana Van Owner Manual
• 2006 GMC Savana Van Owner Manual
• 2007 GMC Savana Van Owner Manual
• 2008 GMC Savana Van Owner Manual
• 2009 GMC Savana Van Owner Manual
• 2010 GMC Savana Van Owner Manual
• 2011 GMC Savana Van Owner Manual
• 2012 GMC Savana Van Owner Manual
• 2013 GMC Savana Van Owner Manual
• 2014 GMC Savana Van Owner Manual

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

Interior

• Front Door panel removal:
• EXT cab Rear Door panel removal:
• Crew Cab Rear Door panel removal:
• Floor courtesy light installation using factory junction panel connection:
• Glovebox light install:
• GMT900 AZ3 three cup jump seat retrofit:
• Jump seat to Console:
• Console to Jump seat:
• Ext cab rear under seat storage:
• Crew Cab rear under seat storage:
• Tow select switch repair:
  http://67-72chevytrucks.com/vboard/s...d.php?t=445827
• Loose auto column shifter fix:
  http://67-72chevytrucks.com/vboard/s...d.php?t=341677

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

HVAC

• Blend and mode door actuator locations for replacment:
  http://67-72chevytrucks.com/vboard/s...d.php?t=809937
• Reset HVAC module: Post #5
  http://67-72chevytrucks.com/vboard/s...d.php?t=808535
• A/C Evaporator drain service:
• HVAC panel lamp replacment:

  • Analog Panel 2003-2007
    https://www.youtube.com/watch?v=VYJhTcjQnlg
  • VFD Digital panel 2003-2007
    https://youtu.be/UaINkoAvu58

• Cabin air Filters

  • Cabin air filter pair OEM 1999-2002:
    http://67-72chevytrucks.com/vboard/s...d.php?t=274151
  • Cabin Air Filter retrofit 2003-2007 (Some GMT900 2007-2014):
    http://67-72chevytrucks.com/vboard/s...03&postcount=9

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

Electrical and electronics

• Add cruise control to 2005 Express van:
  http://67-72chevytrucks.com/vboard/s...d.php?t=375577
• Add transmission temp gauge to instrument cluster:
  http://67-72chevytrucks.com/vboard/s...d.php?t=337456
• Oil Life warning reset without UK3 steering wheel DIC control buttons option:
  http://67-72chevytrucks.com/vboard/s...d.php?t=238195
• Remote Keyless Entry Fob Programming:
  http://67-72chevytrucks.com/vboard/s...d.php?t=180448
• GM Theft-Loc radio unlock
  https://67-72chevytrucks.com/vboard/...d.php?t=826451
• Gentex compass/temp mirror upgrade:
  http://67-72chevytrucks.com/vboard/s...d.php?t=214894
• Instrument Cluster Stepper motor replacement:
  http://67-72chevytrucks.com/vboard/s...d.php?t=511327
• GM Trailer control wiring:
  http://67-72chevytrucks.com/vboard/s...d.php?t=374063
• Trailer Connector:

  • http://67-72chevytrucks.com/vboard/s...d.php?t=547310

• Install breakaway power fuse to enable breakaway battery charge power:
  https://www.youtube.com/watch?v=IPk6DITVvh8
• GM Camper light wiring:
• MBEC SEO, Trailer, and Upfitter port pinouts and how to use.

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

Body

• What do the headlamps look like on 1999-2007 Silverado, Sierra, Suburban, Tahoe, and Yukon https://67-72chevytrucks.com/vboard/...7&postcount=15
• Forward body and lighting style swaps (99-02 03-07 Silverado or Silverado to Sierra front ends or the other direction):

  • 99-02 to 2003-07: http://67-72chevytrucks.com/vboard/s...d.php?t=405832
  • 03-07 to 99-02: http://67-72chevytrucks.com/vboard/s...d.php?t=786523
  • Sierra to Silverado
  • Silverado to Sierra

• Ignition, door, and spare tire lock cylinder re-keying:
  http://67-72chevytrucks.com/vboard/s...8&postcount=22
• Windshield Washer pump and or bottle R&R
  http://67-72chevytrucks.com/vboard/s...d.php?t=808461
• Cab roof clearance lights retrofit using factory junction panel wiring connection:
• Tail lamp swaps Red Late Silverado to Amber/Red GMC & Early-Silverado:
• Forward lamp replacement:
• Side Mirrors:
• Folding Mirrors:
• Towing Mirrors:
• 2007-2014 T900 corner step bumper on the T800 pickups.
  http://67-72chevytrucks.com/vboard/s...d.php?t=802309
• Rustproofing:

  • WoolWax http://67-72chevytrucks.com/vboard/s...d.php?t=806378

• Body leaks:

  • Cab vents https://67-72chevytrucks.com/vboard/...d.php?t=820507
  • 3rd brake light http://67-72chevytrucks.com/vboard/s...d.php?t=787720
    

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

Suspension-Steering-Brakes

• Shock absorber R&R:
• Torsion spring crossmember bushing replacement:
• Parking brake reline:
• ABS Bleed:
• Brake system flush:
• Front control arms:
• Control arm bushings:
• Ball joints:
• Tie rods:
• Pitman arm:
• Idler arm:
• Steering gearbox:
• Steering rack:
• Intermediate steering shaft noise:
  http://67-72chevytrucks.com/vboard/s...d.php?t=362455
• Wheel hub replacement:
  http://67-72chevytrucks.com/vboard/s...d.php?t=513501

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

Fuel system

• Fuel Pressure regulator replacement:
  http://67-72chevytrucks.com/vboard/s...d.php?t=430723
• Fuel-pump/sender module R & R:
• Fuel filter location:
  http://67-72chevytrucks.com/vboard/s...d.php?t=383483

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

Emissions and engine control systems

• EVAP diagnosis:
• Misfire diagnosis:
• Detonation/Knock sensor diagnosis:

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

Engine, Transmission, Transfer Case, Axles Mechanical

ENGINES

Gasoline

• How many 8.1L/496's out there. http://67-72chevytrucks.com/vboard/s...d.php?t=578127
• LS Engine Excessive Oil Use

  • Possible fix using updated GMT900 AFM DOD engines valve cover (GM TSB is in post #8)https://67-72chevytrucks.com/vboard/...d.php?t=810226
  • Another possible fix drilling oil drainback holes in the PCV baffles. https://67-72chevytrucks.com/vboard/...d.php?t=820356

Duramax

• Water pump bypass tube O-Rings upgrade. http://67-72chevytrucks.com/vboard/s...d.php?t=820900

Transmission
Transfer Case

• Shift all pushbutton transfer cases into neutral. https://www.67-72chevytrucks.com/vbo...1&postcount=18
• 1998-2007 GM transfer case models GM New Venture 136, 146, 246, 261, 261HD, 263HD, 263XHD, 261XHD transfer case oil pump rub through prevention/fix:

  • Merchant Automotive New Venture oil pump improved oil pump housing replacement to prevent rear case half rub through. https://www.youtube.com/watch?v=y7im00Wm3sQ
  • Adapt a Plate transfer case saver plate. https://www.thedieselpage.com/reviews/tcase.htm

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

Cooling system

• Oil cooler line leak repair:
• Oil cooler line replacment:
• Transmission cooler line leak repair:
• Transmission cooler line replacement:
• GM electric radiator fan retrofit:
• Hayden Tru-Cool LPD AUX transmission cooler retrofit in factory cooler location:

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

Wheels and Tires

• TPMS
  http://67-72chevytrucks.com/vboard/s...d.php?t=388519
• TPMS retrofit
• GM Factory wheel options:

Re: GMT800 1999-2007 GM Fullsize light Trucks and SUVs FAQ
 

I have a 2003-4.3 silverado. The gas gauge will drop to empty, then go back to normal.Every time you start it the clock resets to 12.00. Going down the road seatbelt light comes and goes. When I first got the truck,starting it caused sparks to fly from the ground bar under back corner drivers side cab corner. I removed ground, cleaned and greased it and sparks stopped. If it sits for a week it will drain a redtop optima battery. When driving it shows over 14 on amp gauge. Any recalls on electrial on these trucks? TIA on any advice that might help.