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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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Old 01-07-2013, 05:26 PM
jace1129 jace1129 is offline
Junior Member
2002 GMC Envoy SLT XL
gold 4.2L I6 2WD
Join Date: Jan 2013
Location: charlotte, nc
Posts: 1
02 envoy overheating

my 02 envoy is overheating..have changed thermostat and flushed sys.. flud levels are all ok..was able to drive under normal conditions but over 65 its starts to overheat again.. now reg driving it overheats .. oh also waterpump replaced a year ago no play in fan.. now i have a belt that squeels intermitten before it starts to overheat,,fan clutch????help
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Old 01-12-2013, 09:44 AM
Daddy Mitzo's Avatar
Daddy Mitzo Daddy Mitzo is offline
2005 GMC Envoy SLT XL
Black 4.2L I6 4X4
Join Date: Feb 2010
Location: Montreal
Posts: 262
Have you changed you coolant temperature sensor? It's located right under the thermostat
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Old 01-13-2013, 10:07 AM
NJTB04 NJTB04 is offline
2004 Chevy TrailBlazer LS
Pewter Metallic 4.2L I6 4X4
Join Date: Aug 2012
Location: Edison, NJ
Posts: 186
The belt squealing (IMHO) is telling you that something in the pulleys is locking up and not turning. Water pump? What condition is the belt in?
Check all the pulleys for binding, etc. You'll find something.
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Old 01-16-2013, 08:54 PM
moostadon moostadon is offline
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2005 Chevy TrailBlazer LT EXT
Magnetic Red Metallic 5.3L V8 4X4
Join Date: Dec 2011
Location: west olive ,mi
Posts: 14
also check and make sure your belt tensioner and the pulley and make sure the bearings are good
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