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Discussion Starter #1
Running stock tune without trailer pulling hills moderately I am running between 1200-1350 on the egts. Probe is installed in passenger manifold. Tranny stays around 200-210 and motor will go up to 215 (all temps taken off edge programmer not stock guages).

Towing about 10-11k my engine temp hits 235-244 before fan comes on. Tranny easily hits 235 and I cannot keep egts under 1200 unless coasting or going down hill. GM says it's normal but it doesn't seem right to me?? Any help? And boost seems a little sluggish. Did air and fuel filters and didn't help.

I cannot even run with the tow tune while towing or egts are 1400+ pulling any incline...

Auxiliary tranny cooler? Coolant flush? Block in radiator?
 

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Discussion Starter #2
Pulling hills with 10k trailer on stock tune I will hit 1400+ egts as well if not very careful
 
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