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Technical & Advanced


Vehicle Appearance, Care, & Maintenance

Help for the do-it-yourself vehicle owner. Suggestions on how to make your truck look better & last longer.

  • 3,973 topics
  • 30,364 replies
Service Before Failure... - last post by 06SierraZ71

Ask the GM Technician

Have a hard question?
Only Questions That You Would Go To The Dealer For, Please!

  • 12,757 topics
  • 51,844 replies
oem fog lights - last post by doug_scott

Performance Engine Tuning

A forum dedicated to intensive and experienced engine and computer modification topics

  • 1,194 topics
  • 10,506 replies
Best tuner to turn off AFM? - last post by 2013sierrasle

Transmission, Suspension, Transfer Case, & Axles

For all transmission and drive-line related topics. Included but not limited to 2WD, 4WD, AWD, transfer cases, & lift/lowering kits.

  • 4,669 topics
  • 34,192 replies
How do I adjust lift - last post by govtech4

Wheels, Tires, & TPMS

Anything related to rims, tires, tire pressure monitor sensors, fixing a flat, and general tire maintenance here.

  • 2,736 topics
  • 20,621 replies
New BFG All Terrain T/A KO2 - last post by snarkee

Audio, Electronics, OnStar, & SiriusXM

SiriusXM, Bluetooth, Navigation Systems, OnStar, RemoteLink, smartphone connectivity, & aftermarket audio.

  • 5,250 topics
  • 27,473 replies
Triple contacts in Mylink f... - last post by astasky


Installations, Maintenance, and Repairs.

  • 905 topics
  • 4,554 replies
Heated Steering Wheel Insta... - last post by Zebrafive