Problems with the Envoy have been many.
Battery has drained numerous times; replaced twice.
Gas gauge does not work.
Speedometer does not work.
Left rear rotor bad (@ 75,000 miles) due too bad brake pad, worn completely out, so replaced right side as well.
Had a local mechanic replace a control module in driver side door from GM, fixed gas and speedo, both not working again.
Tail light bulbs failing.
Clunking sound in the front end when going over any kind of bump/pot-hole.
Lower valance on front bumper lost the clips that secure it to the bumper on each side. (Not due to hitting a curb.)
There are some more, but those are the big ones.
When we bought the Envoy we were very pleased, but now not so much.
I like the power, the room and the third row, but the little things that were wrong turned into a big deal.
I hated getting jumped all the time with the battery issue, which has just "gone away".
I don't know what to think of this SUV, or GMC for that matter.
I have had a '03 GMC 1500 before, loved it, no worries.
Have to say overall that I hate this SUV, trading it off soon.
Wish I had my Audi TT back!