My b3500 5.9L when towing up hill gauge goes high and then comes back down what could this be going on.

Thanks
Jerry

Maybe your gauge is sticking and it could possible be your thermostat. Have you checked it?

maybe your gauge is sticking and it could possible be your thermostat. Have you checked it?

No I will do that its only happen towing or when the weather is warm .

Check you thermostat and maybe oil the cable for the gauge.

Check you thermostat and maybe oil the cable for the gauge.
O K thank so much possible would the head gasket be a problem? also the water level is full not having too add water, and no moist on the dip stick,a tailk pipe is dry no smoke.

With what you described there it doesn't sound like it would be the head gasket.

With what you described there it doesn't sound like it would be the head gasket.

Oh Thanks For that Will ck the firstt thing first you spoke about

Have a great day
Jerry

No problem, you too.