Does anyone know how to change thermostat and sparks plugs on 04 Chevy Trailblazer?

[huey354]

I am currently having engine problems and i really dont know what is causing it. I am getting a code p0128 and they tell me that it could be the tstat or the spark plugs. Can some one please help? the car turns off everytime i go on reverse and when driving it looses power.

[Country Boy]

You can read the coolant temperature in the dash. It should be between 195 - 205 when the motor has warmed up. The thermostat is a "bear" to get to on the 5.3 motor as it's on the right side 3/4 of the way down near the fan shroud. The 4.3 thermostat is in the normal location. AC-Delco iridium spark plugs and * AC-Delco ignition wires should go on the vehicle at no more than 75,000 miles.

If the motor is loosing power at highway speeds one of the 6 or 8 ignition coils (you didn't say which motor you had) may be at fault. Take it to a Chevrolet dealer an let them scan your on-board computer to find the real fault of your problem. Don't use off-shore box-store ignition parts on a GM product.