GMC Envoy Losing Coolant very slowly 4.2L

8 messages, Last post on Nov 08, 2009 at 4:00 PM

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#6 of 8 GMC Envoy 4.2 L coolant leaks by reg11 May 29, 2008 (7:06 pm)
I am having the same issue with my 2002 Envoy 4.2 L engine. Had it in the shop twice, cannot seem to locate where coolant is going. Loosing 2 litres or more between oil change?? I know there were cylinder sleeve crack issues with these engines when they first came out- hope it's not that! Anyone else having similar problem or had it fixed. Replies to this message: agage (Nov 08, 2009 2:01 pm)
#7 of 8 Re: GMC Envoy 4.2 L coolant leaks [reg11] by agage Nov 08, 2009 (2:01 pm)
Replying to: reg11 (May 29, 2008 7:06 pm) My baby sister is having the same problem with her 2007 Envoy 4.2.L engine. The radiater has been pressure tested and ok. Compresson tested ok. No sign of fluid on driveway and no discoloring of the tail pipe. Has anyone out there found a answer to this problem? If so what is the answer.
#8 of 8 gmc envoy 4.2 L coolant leaks by agage Nov 08, 2009 (4:00 pm)
Have a 2007 Envoy that loses antifreeze at a abnormal rate. The radiater has been pressure tested and ok. Compression tested and ok. No sign of fluid in driveway and no discoloring of the tail pipe. No increase in oil level, which would indicate it leaked into the block . Has anyone out there found a answer to this problem? If so what is the answer?