I just took a cross country vacation with my 05 Envoy (4.2) and it was less than "worry free" I was pulling a 4800 pound travel trailer and within all the specs that GM laid out in the manual (GVWR, towing capacity etc)
The engine overheats going uphill in the mountains, to keep it from blowing the head gasket I would reduce speed but that meant that by the time I reached the summit I was often only going 10 miles per hour with my emergency flashers on.
Is that normal? Am I asking too much of the Envoy?
The trailer is a small 19 foot with dual axles and electric brakes and the guy I bought it from said he had no trouble in the mountains with his six cylinder Toyota Truck so I figured the Envoy would be OK.
Should I try a separate trans oil cooler? a bigger rad? flash the ECU?
Or is it time to move up to a vehicle with a V8.
The engine overheats going uphill in the mountains, to keep it from blowing the head gasket I would reduce speed but that meant that by the time I reached the summit I was often only going 10 miles per hour with my emergency flashers on.
Is that normal? Am I asking too much of the Envoy?
The trailer is a small 19 foot with dual axles and electric brakes and the guy I bought it from said he had no trouble in the mountains with his six cylinder Toyota Truck so I figured the Envoy would be OK.
Should I try a separate trans oil cooler? a bigger rad? flash the ECU?
Or is it time to move up to a vehicle with a V8.