2003 Seat Installation and wiring diagram | Chevy Tahoe Jan 01, 2013I have a set of seats out of a 2003 Tahoe that I just picked up off craigslist. I am going to be putting them in a 89 K5. One of the rails seems easy to mount with either one or two bolts. The other seat track however is interesting as getting a bolt or a nut into the bracket looks near to impossible. 2003 GMC Sierra Vehicle Seat Covers | etrailer Fastest shipping available and a lowest price 2003 GMC Sierra vehicle seat covers guarantee. Expert lifetime technical support on all purchases. Complete 2003 GMC Sierra Vehicle Seat Covers installation instructions and customer reviews. Call 800-298-8924 to place your order or order online at etrailer.