I have an 03 trailblazer and I had a code for the therstat but the truck would buck and the tach needle would jump when the it hit 1800 to 2100 rpms but the speed do would be ok. the only code was for the thermostat which I replaced and alos replaced the fuel filter, blet and put in ac delco plugs code was cleared themp ok but still have the same problem when at 1800 rpm , stepping on the gas pushes thru the problem but whne the tach hits the same area it bucks.
I was thinking of chamging the vss but doesnt that only work to tell the tranny to shift, my last resort to to have the cylinders checked for leaks, I was told it could be the valve seats could be wearing that meand a new head and motor work.
Please advise with any help
I was thinking of chamging the vss but doesnt that only work to tell the tranny to shift, my last resort to to have the cylinders checked for leaks, I was told it could be the valve seats could be wearing that meand a new head and motor work.
Please advise with any help