The Envoy has an automatic belt tensioner so I assume the belt is tight enough. I'm pretty sure the belt was replaced about 12K miles ago as I replaced the water pump, idler pulley and fan clutch.[/QUOTE]
The tensioner pulley is automatic, but after 160k the spring may be losing it's tension.
Originally Posted by crmcknight
Thats what I wonder too. It seems like a lot of people on this forum recommend cleaning the TB as a cure all for almost every issue. Whether it has anything to do with your situation or not, idk.
If the idle will not stay steady after disconnecting the battery, when it was steady before the disconnect, it is a common symptom of a dirty t-body.
Also, to the OP: check all of the grounding spots for bad connections for your battery problems.