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73guna's avatar
73guna
Explorer
May 05, 2016

*UPDATE*Calling Duramax owners 1st trip with camper bad fuel mileage

I have a 2007 crew cab Duramax LBZ 4 wheel drive. We recently got back from our first camping trip with our new Wildwood 31qbts. The trailer weighs in dry at approximately 8500 pounds. Loaded down I ...
Tow Vehicles
JoeTampa's avatar
JoeTampa
Explorer
Aug 03, 2016
AUwing2 wrote:
You might have the dealer look for a leaky injector or low pressure. I've had 2 DMax's, an LBZ and LMM. Both are consistent 10.5 - 11.5 with the occasional 12 when on cruise @ 62/63 mph. First tho, if it's running and starting fine, rerun your test at slower speeds and don't worry about getting up to full speed to fast.


I get 12 on average depending on speed and how flat the road is. I've gotten as high as 14 and as low as 10.

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