Question about 1999 Pontiac Montana
We change water pum,heater core,flush
Likely leaky heater core. May try pellets that GM offers to seal small leaks. Contact dealer or good auto parts store. Rad pellets
Posted on Dec 10, 2014
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Posted on Jan 02, 2017
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Dec 07, 2016 | 2006 Pontiac Montana
Apr 25, 2012 | Cars & Trucks
To troubleshoot this types of problem,click the link below
--------Go through the procedure to confirm the issue.
Engine Overheats and heater blowing cold?
Heat blows cold on drivers side and hot on passenger side?
This will help.Thanks.
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