A very common problem with the C4 sport seat is the failure of the pump that inflates the lumbar bladders internal to the back of the seat. The most prevalent failure is not the pump assembly, but simply the diaphragm within the pump sub-assembly. To gain access to the pump, look under the front of […]

How to Repair & Refinish Interior Plastic Pieces by Lars Grimsrud SVE Automotive Restoration Musclecar, Collector & Exotic Auto Repair & Restoration Broomfield, CO Rev. New 5-7-01 Having seen some pretty rough-looking ‘Vette interiors, and some rougher-looking ‘Vette interior repair & refinish jobs, I thought I’d put together a little how-to on making your black […]

This tip provides additional information to the Tech Tip “FIXING YOUR C4 SPORT SEAT LUMBAR SUPPORT” authored by Bob Thibodeau on 6/15/2001. 1. An alternative source for material to replace the ruptured diaphragm is a bicycle inner tube. It is much thicker than the original diaphragm, and should provide longer “life”. To prepare the tube, […]