Quote:
Originally Posted by bubba 96
Had a 99 silverado, pulling my 27.5 ft fifth wheel and 14 foot tinny, I thought that poor 6 liter was gonna blow up seemed to constantly run over 3000 rpm when towing,and tranny would up and down shift a million times and was a pig from airdrie to red lodge in Bowden back to airdrie tank of gas.... 80 l tank didn't get 300 kms at most times never mind in a cross wind, got rid of the gas jobber for my diesel... However it was the most comfortable ride I had....
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This is exactly how my friend describes his 04 GMC 6.0L It also does the high rev and stays at high rev thing when pulling and coming off a hill, he has to tap the brakes to get it to idle down. Plus the gauge cluster problems. Another friend had one and he owned a mechanic shop. He did everything he could as far as upgrades etc to get the mileage up. Nothing worked. Nice trucks, pigs on fuel seems to be what everyone says.