Earlier this year, I solved a cold start issue with my 2008 Yukon XL (5.3 LMG) by replacing my ECT sensor. I discovered a few other issues along the way to that fix and one of those issues is that my intake air temperature consistently reads 32°, regardless of environmental conditions or engine...
My Tahoe has 59,000 miles and has been great. It has new spark plugs and wires. Newer battery and starter. New air filter and MAF sensor. Lately it has stumbled on cold start, but runs great after a 60 second warm up. Today it will not start at all. It is warm today in Michigan at 60...
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