Cat 300 running hot on gradea
In 90+ weather when pulling a long grade my 05 Bounder 34m with a 300hp Cat will run in the hot on the guage and the yellow light comes on, I will down shift and let up on pedal. When top of pull it c...
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Plus if you are towing the Tahoe you are close to the GGWR I suspect which just adds to the load. We always down shift at the beginning of long grades.This engine has two thermostats that Cat recommends changing out at regular intervals.
