20 Most Recent 2008 Chevrolet Uplander - Page 3 Questions & Answers

the stability system has a problem. You will have to have someone read the code to see which component is bad.

blower motor resistor is bad

Why ? Did you test ? Hook up a scan tool to see if the PCM/ECM - engine computer is reading coolant temp. ? Testing not guessing ? Do you even know how the system works . The engine cooling fan system consists of 2 electrical cooling fans and 3 fan relays. The relays are arranged in a series/parallel configuration that allows the engine control module (ECM) to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood fuse block. During low speed operation, the ECM supplies the ground path for the low speed fan relay, which is Fan 1 Relay, through the low speed cooling fan relay control circuit. This energizes the low speed fan relay coil, closes the relay contacts, and supplies battery positive voltage from Fan 1 Fuse 29 through the cooling fan motor supply voltage circuit to the left cooling fan. The ground path for the left cooling fan is through the Series/Parallel relay, which is the Fan 2 Relay, and the right cooling fan. The result is a series circuit with both fans running at low speed. During high speed operation the ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. The ECM supplies a ground path for the high speed fan relay, which is the Fan 3 Relay, and the Series/Parallel through the high speed cooling fan relay control circuit. This energizes the Series/Parallel relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time the Fan 3 Relay coil is energized, the relay contacts close to provide battery positive voltage from Fan 2 Fuse 33 on the cooling fan motor supply voltage circuit to the right cooling fan. During high speed fan operation, both engine cooling fans have their own ground path. The result is a parallel circuit with both fans running at high speed. When the request for fan activation is withdrawn, the fan may not turn OFF until the ignition switch is moved to the OFF position or the vehicle speed exceeds approximately 10 mph. This is to prevent a fan from cycling ON and OFF excessively at idle.

battery secure? make sure battery isn't moving around

vent valve ? emission canister vent valve ? Under the vehicle near the fuel tank.

Is the heater core slowly leaking antifreeze? Do you smell any sweet smelling antifreeze smell associated with a leak?

Or, do you drive through a lot of construction zones that blow contaminated air onto the windshield?

There is a crank relay, is that what your talking about? I didn't see an antitheft relay as such?

The only info I found was, control arm nuts--162 ft lbs Hope we are talking about the same thing?

It has no fuel filter just a filter screen in the inlet of the electric fuel pump. You are guessing here, not a good idea on modern computer controlled cars. You need to have the engine control computer scanned for fault codes, once you have those you do the diagnostics for those faults and arrive at the repair solution. You can have the fault code test run for free at any Autozone parts store or other parts store like them.

I usually drain the antifreeze, first. Dispose of properly.

https://www.google.com/search?q=Fuel+fuse+for+toyota+yaris&biw=1363&bih=650&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiLrNj3zsnQAhUGRyYKHedRBEoQsAQILw#tbm=isch&q=How+to+remove+the+radiator+from+a+2008+Chevy+Uplander

Upper intake manifold says 18 ft lbs rocker arm cover says 89 in lbs

old and new model evop vent control valve

usually due to lack of maintenance or abuse

Purchase a Haynes repair manual from your local auto parts store. It Has The Step By Step instructions. Most vehicles require a lot of dash disassembly (up to and including removing the entire dashboard) as well as discharging the a/c system.

It is located on the driver side of the engine below the exhaust manifold