Tom K
Registered User
I have 06 duramax LBZ. When towing 9000 lb camper, truck will start overheating and when I back off it will go to limp-in mode. Thinking fuel filter, I remove it and find it half empty. Replace filter and it will run for 30 - 60 miles and do it again. I've had cooling system replaced (that's right, everything. $3400), had injection system checked, and engine vacuum checked. Still does it. I've been reading about cracked filter housings. Could that be it? I'm at a loss. planing another trip in 2 weeks a am dreading it. Truck has 160,000 miles. Thanks for any advice