Chevrolet Computers & Internet - Popular Questions, Answers, Tips & Manuals

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Circuit/System Description The sunroof control module supplies each of the sunroof switch signal circuits with a 12-volt reference. When a switch is pressed the signal circuit is pulled low signaling the sunroof open or close request. The module determines the motor direction based on inputs received from the sunroof switch. Sunroof Motor/Actuator Initialization/Teach Process Perform the initialization/teach procedure any time: ?€¢ A new sunroof motor/actuator has been installed.

?€¢ The existing sunroof motor/actuator has been removed and reinstalled.

?€¢ The sunroof system has suffered 3 interruptions for emergency events, i.e. anti-pinch, debris in tracks etc., and normal operation is canceled.

By performing the initialization/teach procedure, the sunroof motor/actuator records the open vent stop position. The motor/actuator will then understand the other positions, closed and full open soft stop, and allow express and obstacle detection functions.

1. Ensure that all electrical harness connectors are connected.
2. Turn the ignition to ON.
3. Completely close the sunroof window with the manual close switch.
4. Press the sunroof vent switch to the vent open position until the sunroof window stops, and continue holding the switch for at least 10 seconds.
Important: The initialization/teach procedure is not complete if the battery and/or ignition power has been interrupted during the process. The Initialization/Teach Process must be restarted if the procedure is not carried out completely.
5. Verify the operation of the sunroof in all positions.

If this does nothing ! Important: Because of the accessibility of the sunroof switch, perform the sunroof switch component test before beginning the Circuit/System Testing. Power Sunroof Malfunction

1. Ignition OFF, disconnect the harness connector at the sunroof control module.
2. Test for less than 5.0 ohm between the ground circuit terminal 2 and ground.
?‡' If greater than the specified range, test the ground circuit for an open/high resistance.
3. Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
?‡' If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, replace the fuse and replace the sunroof control module.
4. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 5 and ground.
?‡' If the test lamp does not illuminate, test the ignition circuit for an open/high resistance. If the circuit tests normal, refer to Retained Accessory Power (RAP) Malfunction.
5. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 6 and ground.
?‡' If the test lamp does not illuminate, test the ignition circuit for an open/high resistance. If the circuit tests normal, refer to Retained Accessory Power (RAP) Malfunction.
6. Ignition OFF, connect the harness connector at the sunroof control module.
7. Disconnect the harness connector at the sunroof switch.
8. Test for less than 5.0 ohm between the ground circuit terminal 5 and ground.
?‡' If greater than the specified range, test the ground circuit for an open/high resistance.

Important: Apply ground to the module for no longer than 2 seconds at a time or the module could be damaged. When performing the following tests, make sure that the sunroof or sunshade is not at its end of travel position by switching the grounded jumper to the other signal circuit if the sunroof or sunshade does not move in one direction.

9. Ignition ON, momentarily install a 10-amp fused jumper wire between the signal circuit terminal 6 and ground. The sunroof should move.
?‡' If the sunroof does not move, test the signal circuit for a short to ground, short to voltage or an open/high resistance. If the circuit test is normal, replace the sunroof control module.
10. Momentarily install a 10-amp fused jumper wire between the signal circuit terminal 4 and ground. The sunroof should move.
?‡' If the sunroof does not move, test the signal circuit for a short to ground, short to voltage or an open/high resistance. If the circuit test is normal, replace the sunroof control module.
11. With the sunroof in the fully closed position, momentarily install a 10-amp fused jumper wire between the signal circuit terminal 2 and ground. The sunroof should vent open.
?‡' If the sunroof does not vent open, test the signal circuit for a short to ground, short to voltage or an open/high resistance. If the circuit test is normal, replace the sunroof control module.
12. Momentarily install a 10-amp fused jumper wire between the signal circuit terminal 8 and ground. The sunroof should close.
?‡' If the sunroof does not close, test the signal circuit for a short to ground, short to voltage or an open/high resistance. If the circuit test is normal, replace the sunroof control module.
13. If all circuits test normal, test or replace the sunroof switch.

Check the rocker button panel has power if it is electric,may need replacing the switch panel.

Apart from not understanding what you mean, a Chevrolet isn't a computer system.

I have this problem with my expedition. I don't know if you have air suspension or not but I found with my vehicle if I started pumping before the air was out it would stop the pump. The nozzle was shifting positions as it went down. I did find however that if I did not put it quite all the way in it would rest in a position that would keep it pumping until it was full. Hope this helps.

code p 0101 refers to mass air flow(MAF) sensor/volume air flow (VAF) sensor--range / performance problem===causes-- intake leak/ blockage ---MAF/VAF sensor I would start by replacing the sensor

The condensate drain line normally runs thru the engine compartment firewall on the passenger's side. about halfway down. Look for a rubber hose protruding out through a rubber grommet. The "water" you are getting could be from one of three sources:

1. A/C condensate if the drain line is clogged.
2. Engine coolant (same reason)
3. Water leak from door seal or windshield gasket.

Feel and smell the liquid. If it smells sweet or has an oily feel, it may be engine coolant. If it is, you most likely have a heater core that is leaking. Hopefully that is not the case. Otherwise, clearing the clog from the drain line should help solve the issue.

2008 Chevrolet Uplander Problems, Defects & Complaints

www.carcomplaints.com/Chevrolet/Uplander/2008/ 4 days ago - The 2008 Chevrolet Uplander has 31 problems & defects reported by Uplander owners. The worst complaints are electrical, engine, and fuel .

It's the lower part of the button to the right of the headlight knob.

3 things bad tire bad cv axel or bearings

PO507 is Idle Control System RPM high.

PO507 indicates Idle Air Control System RPM Higher Than Expected.

take it to a shop to read the code and see what is going on

Sounds like your database is corrupted is there a way to update your map data. Or download a map upgrade from the internet?

Hi Their Yes Their is ABS Codes Realated to the Cloc springs. I would take it to the nearest Dealer they can or should check your ABS codes For free. Hope it helps

may need to replace the thermostat or radiator hoses

Because your radio is shorting out or you have a pinched wire somewhere in wire harness. Fastest way to find out is remove radio and disconnect all wires, then plug another fuse in. If it blows than its a wire problem, if it doesn't radio is bad. I’m happy to help further over the phone at https://www.6ya.com/expert/david_c087e4b7d13c0163

sounds like a valve issue. Recommend taking to an ASE certified mechanic. This fix is "EXPERT" level. If you are comfortable with pulling the heads off of your engine, get back to me, and I will walk you through it.