Forum Discussion
Tom_Anderson
Oct 26, 2015Explorer
sno-pro79 wrote:
I have a 99 Crew cab dually 7.4 ,bought it new. it has 75,000 miles.
We put 7000 miles on it since june 2015.
The only failure to date is an idler pulley.
I have done some engine work, advanced the cam to lower peak torque, new injectors and custom tune.
I have a 24' boat and a Northstar 8.5 Truck Camper that it tows just fine.
7-9 mpg is the norm with a load .
I assume yours is not a California model? I had a 99 Suburban with the 7.4 (California model) and the idler pulley failed about 150 miles from home. Since the idler pulley was a California-only part, NO auto parts stores had it in stock (even though I live in California) and it took me a week to get it from Kansas.
Keep that in mind if you buy something of that era with a 7.4
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