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Nimisys · 05-22-2004, 12:28 PM

For the most park the Yukon/Tahoe are a solid truck design. The GenIII V8's in them (4.8 or 5.3 in the tahoe, the 5.3 or 6.0 for the Yukon and Denali) scare a lot of the heavyline GM techs due to their solid reliability and lack of work they provide the techs. the only two complaints with the motors is they lack the low end punch of the old TBI 5.7s, the other one is with the air induction and fuel delivery systems. they need to have fuel system cleaner ran through regularly (about every 15K) and the Throttle body also needs to be regularly cleaned and de-carboned to prevent low idle and hesitation drivability issues. otherwise the engines are quite solid. some still exhibit a cold knock condition, but it goes away when warm and so far engineering is reporting zero wear caused by it on fleet engines at 350,000 miles. The 4L60E transmission is fairly solid, with timely maintance. burnt 2-4 bands and stripped reactionary sun shells (no reverse) are the two primary failure conditions, and entiher requires a full overhaul to repair. i have seen a few of the 6.0L Denali's eat the input gear set, which most of the time does require a SRTA for a cost effective repair. the rear ends are stout for the most part, though the genII (upto 99) had a some weak side carrier bearings. the front diffs however can be spotty. they often need to be resealed once under warranty for leaky and the case split. also they have been getting shitty bearings acorss all the front diffs, resulting in a howl on the coast side.

a yukon or tahoe and a GMPP through 75,000 miles is a very nice setup. they enjoy a tight turning radious and a roomy interior. whle it is plasticy for the most part they last quite well and aren;t to noisey. there are far worce choices on the market right now.

another truck to consider would be the avalanche. it is built ont he suburban frame and shares the same driveline and interior bits. it benefits those who want the open bed space of atruck but the roomier seating of an SUV. the plastic lined cargo box int he back would work exceptionally well for suba equipment and snowboards where things can be sprayed off in the truck. now that they can come without the side mouldings they aren't nearly as ugly anymore either.

05-22-2004, 12:28 PM	#13 (permalink)
Nimisys Crazy Location: San Diego	For the most park the Yukon/Tahoe are a solid truck design. The GenIII V8's in them (4.8 or 5.3 in the tahoe, the 5.3 or 6.0 for the Yukon and Denali) scare a lot of the heavyline GM techs due to their solid reliability and lack of work they provide the techs. the only two complaints with the motors is they lack the low end punch of the old TBI 5.7s, the other one is with the air induction and fuel delivery systems. they need to have fuel system cleaner ran through regularly (about every 15K) and the Throttle body also needs to be regularly cleaned and de-carboned to prevent low idle and hesitation drivability issues. otherwise the engines are quite solid. some still exhibit a cold knock condition, but it goes away when warm and so far engineering is reporting zero wear caused by it on fleet engines at 350,000 miles. The 4L60E transmission is fairly solid, with timely maintance. burnt 2-4 bands and stripped reactionary sun shells (no reverse) are the two primary failure conditions, and entiher requires a full overhaul to repair. i have seen a few of the 6.0L Denali's eat the input gear set, which most of the time does require a SRTA for a cost effective repair. the rear ends are stout for the most part, though the genII (upto 99) had a some weak side carrier bearings. the front diffs however can be spotty. they often need to be resealed once under warranty for leaky and the case split. also they have been getting shitty bearings acorss all the front diffs, resulting in a howl on the coast side. a yukon or tahoe and a GMPP through 75,000 miles is a very nice setup. they enjoy a tight turning radious and a roomy interior. whle it is plasticy for the most part they last quite well and aren;t to noisey. there are far worce choices on the market right now. another truck to consider would be the avalanche. it is built ont he suburban frame and shares the same driveline and interior bits. it benefits those who want the open bed space of atruck but the roomier seating of an SUV. the plastic lined cargo box int he back would work exceptionally well for suba equipment and snowboards where things can be sprayed off in the truck. now that they can come without the side mouldings they aren't nearly as ugly anymore either. Last edited by Nimisys; 05-22-2004 at 12:30 PM..