I have a 2004 Chevrolet Trailblazer. Why is it shaking and it turned off? I had the air conditioning on an when i got off the freeway and stopped at a light thats when it starts shaking and also turned off please help.
Answer: Your truck stalling when coming up to a stop is a very common problem of carbon in the throttle body. You need to clean the throttle. Carbon buildup prevents the electronic throttle from being able to control the idle, especially with the A/C on, or turning at slow speeds. After cleaning, let the truck, start it up, rev it a few times to clear the cleaner out, then let it idle for 5 minutes, turn it off for 1 minute, then let idle for 5 minutes. Shut it off again, then take it on the expressway. When you get off, come to a stop and let it idle in gear for another minute. This should reset the idle. If not, a scan tool hooked up tot he computer will be needed to relearn the idle.
Question: GMC Envoy 4.2 L 6cyl replaced the GMC thermostat but the lower hose is warm but not hot. The upper hose is hot what dose that mean?
Answer: Make sure that you bled the air out of the cooling system. It can take quite some time. After it warms up with cap off, take for a drive and do a few hard acceleration. You should hear air / coolant sloshing throught the dash heater core. Then shut it off and let it cool down. This will usually bleed the air.
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