Put 3300 miles on the truck - Calgary, Reno (hot august nights), Bonneville (Sausage on the Salt), Calgary.

It likes to cruise at 85 (2500 rpm) got about 16 mpg with the low reverse band draging in the transmission. Once the turbo was replaced the drive from Reno to Wendover was quick...

Wounded/consumed parts

turbo (something broke loose and went through the compressor)- not a cheap fix..

2 gallons of coolant..

low/reverse band and forward planetary in the 4l80...

Cruise control worked well unless it yanked the throttle to far and the turbo spooled hard - then it freaked out.. close open close ..

Air conditioning worked well enough not to be un-comfortable.

Last edited by efi-diy; 08/20/13 01:49 AM.
51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them