The GMT400 (1988–1998) dashboard is notorious for cracking over time. Here are the best ways to address it.
Why GMT400 Dashes Crack
The factory dash is a hard plastic composite that expands and contracts with heat cycles. Over 20+ years in the sun, it develops cracks typically starting at the instrument cluster surround and defroster grilles.
Option 1: Coverlay Dash Cover (Best Value)
A molded Coverlay dash cover is a precision-fit ABS cap that snaps over the existing dash. It’s available in factory color or black and completely covers all existing cracks.
Installation: 30 minutes, no tools required.
Cost: $100–150.
Option 2: Dash Pad Replacement
Complete replacement dash pads are available for GMT400 trucks from Goodmark Industries. The pad replaces the entire top dash surface from the firewall to the instrument cluster.
Cost: $250–400, installation: 3–4 hours.
Option 3: Vinyl Repair Kit
For minor cracks, a vinyl repair kit with filler and texture spray can cosmetically repair the damage. Results are temporary but extend the life of the original dash several more years.
Interior Refresh Checklist:
While addressing the dash, consider:
- New FH Group Seat Covers for the bench or bucket seats
- Replacement door panel clips
- New carpet or rubber floor mats
- Steering wheel restoration or replacement
The GMT400 interior can look virtually new with these relatively inexpensive improvements.