My 89 GMC 4X4 Burb

[79Silv4x4]

Originally Posted by kcmongo

[*]Would like to make some mods to improve the gas mileage a bit, have heard about TBI spacers and cold air intakes, looking for more info on those and any other good idea’s.

O' and educate me on the auto locking front hubs, what's the scoop?

Don't worry about the mileage 'improvements'--keep it tuned and that's about it. These things are bricks and will only get so much MPG. As a side note--the skinny tires from the factory were there for a reason--MPG. Putting on a decent size tire/wheel will cut your mileage. Trust me.

As for the auto hubs--ditch them for a pair of manual lockers--$100 or so