I have a 2002 GMC Envoy with 270,000 miles. I have had for 4 years and have had no major problems with the motor or tranny. I have had to replace the valve cover gasket, rack and pinion steering, ignition coil packs, front hub assembly on both sides, windshield wiper motor, rear shocks, air shocks (once and the second time I put on springs), air compressor, starter, and water pump. However, those go out on most makes around 200,000 miles I would assume. the four wheel drive was awesome for one bad winter, but has recently stopped working electrical problem or actuator switch I am guessing ,So I would have to say for 270,000 miles and having no engine or tranny problems I cant complain.
I am the second owner of my 2002 Envoy. Bought it in 2006 with 52k miles. It presently has 110k and had never once needed repairs. I've had to replace the battery and tires, but those are expected repairs. Yesterday, I took it in for the 90k service and also requested a complete check of all parts, engine and otherwise. The original rotors and brake pads were due for replacement - but, I was told they could last another 2,000 miles. The serpentine belt had minor cracks, and was told it would last a few thousand more miles. Needless to say, I replaced all that was found after looking at the old parts myself. After 110k there have been no major mechanical problems. Very impressed.
I bought my Envoy in 07 before gas prices went all nuts. I ended up trading it for a foreign piece of crap that now burns oil at less than 75k miles! I WANT MY ENVOY BACK!!! :( I was actually in a pretty scary accident in the Envoy and walked away without a scratch. Did a 360 on black ice going up a hill (didn't have 4WD on because I didn't think it was slick out). The Envoy had some pretty bad body damage but was 100% by the time my body shop guy got done with it and it ran like a dream the entire time I had it. Only issue was a fan belt (I think that's what it was called) that needed replaced for $400. Sounded like I was driving a semi when it went out! :)
I have a 2002 Envoy SLT beautiful with all the bells and whistles. I have had nothing but problems since I purchased the truck in 2004 with 30k miles. It has been at the dealership 18 times in the last 3 years. I am finally getting it fixed for the last time to trade it off. So many problems too many to mention. It has been a money pit for me.
I bought a 2002 Envoy SLT at 93K miles. So far I've put 3K miles on it and have been very pleased. I use it mainly for towing a travel trailer and with the powerful V6 it does a good job. Interior is great, very comfy leather seats and I love the stereo. The ride is smooth and great acceleration. Gas mileage (without towing) is surprisngly good too. Highway only driving is about 22MPG, city about 15. Not great but not bad for a powerful SUV. I was hesitant to buy a used GM vehicle. But so far after 3 months and 3K miles driven, I'm happy with the purchase.