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Technical & Advanced


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Vehicle Appearance, Care, & Maintenance

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

  • 3,935 topics
  • 30,092 replies
Detailing 2014 Sierra Wheel... - last post by CANDenali

Ask the GM Technician

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

  • 12,641 topics
  • 51,148 replies
98 sierra wont start - last post by Duelin

Performance Engine Tuning

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

  • 1,186 topics
  • 10,473 replies
Intune question. - last post by RWD

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.

  • 4,646 topics
  • 34,091 replies
Holes in frame wheel well g... - last post by 48548

Wheels, Tires, & TPMS

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

  • 2,705 topics
  • 20,398 replies
What is the largest tire si... - last post by kdeerman

Audio, Electronics, OnStar, & SiriusXM

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

  • 5,230 topics
  • 27,420 replies
Anyone else not happy with... - last post by Smoothbassman

How-To

Installations, Maintenance, and Repairs.

  • 898 topics
  • 4,507 replies
How to change the headlight... - last post by fraggedout