Join Date: Dec 2008
Location: Washington State
Thanked 59 Times in 55 Posts
Are you sure your tranny isn't stuck in 4th? I had a Duramax do this to me, I think this might be what they call limp mode?
2008 Red CCSB 6.4 Auto Lariat.
Stock 20's wrapped in 35x12.50R20 Toyo MT's, 3.73 gears, Nav, Backup Cam, Tailgate step, Upfitters, etc.
AFE Intake, Line-X, 20% Tint, Clear Bra, Husky Mats, Smoked Recon Mirror markers/3rd brake light, Bushwacker Pocket style flares w/ mud flaps + an aluminum Rapid Hitch (one of the best investments!)
Feel free to PM with any questions about any of my mods.
SRW Club #55
American Club #55
Last road trip-567 miles @ 20.7 mpg @ 67mpg average speed.