Question about 2002 GMC Envoy
Blower Motor runs constantly to drain the battery. Replaced battery but dont know where LPM is located to check it?
Posted by Anonymous on
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Posted on Jan 02, 2017
do you have power to it..or a bad ground around blower motor? is the head unit not signaling the blower to run?...calling it with A/C or heat or just fresh air ..try all settings and advise...good luck
Posted on Jan 08, 2009
Your problem is the Relay which is encased inside the Heater/AC Resistor Module. This is a very common problem with GMC and Chevy Trucks. The Relay's return spring fails and the relay is held closed by gravity. The only fix is to replace the Resistor Module. I have a 2004 Silverado and have replaced the Module 3 times and the Blower Motor twice. The Orange wire feeding the Module is always Hot (12V) and feeds the Relay Contact for Highest Blower Speed. Hence the Blower runs all the time even with the Key off and removed.
Posted on Oct 21, 2009
Go to link below for directions on how to change resieter. It is for a trailblazer but you do it the same on an envoy also.
Posted on Nov 20, 2009
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