Duramax Lifetime Supporter
Join Date: Oct 2009
Location: Jax, FL
Your report is another example of poor paint adhesion/quality on our trucks.
I had corrosion growing from underneath the upper stop/bed light. I took the truck to the dealer. The body shop foreman informs me that just about every 2500/3500 truck that he has seen develops this issue at some point. When I requested a warranty repair, he just laughed.
My truck is obviously a bit older than yours and has never seen salt.
If your case is anything like mine, you are SOL.
09 GMC SLT Dually
Steel Gray Metallic
All options except sunroof
Mods so far:
Alcoa 19.5s with Michelin XZE, Centramatics,Tow Mirrors, Chrome Grill Overlay, Rear underseat storage, Mudflaps all corners, 20% Window tint, 6" Oval Steps, B&W Turnover Hitch, B&W Companion Hitch, Sulastics, GM Campaign #PIT3009J, Wireless Console Charging, Bilstein 5100s, Raptor 3602RL
DF DRW Club Member #161