Chevrolet Suburban 1500 - Recent Questions, Troubleshooting & Support

Do you need just colors, or actual pin locations?

If you touched any of the A/C controls within 45 seconds of starting your Suburban (after the battery change), you messed up the 'calibration mode' of the HVAC.

Pull the HVAC fuse (10amp) under the hood, and pull the two adjacent fuses (30 and 10amp) under the dash listed as 'climate control' in the manual.

Push the fuses back in, restart your car, but DONT TOUCH ANY of the A/C controls for 90 seconds.

I bet the A/C starts working again normally.

cheaper ,faster and eaiser too just replace it,200.00-400.00 at a bone yard 1200.00-2300.00 too rebuild
a lot of years interchange with it best too pull it and match it up

@Anonymous,I have a 2001 K1500 Suburban, and need the Wiring Diagram to sort out why the Power Mirrors and Windows don't work.Ordering new mirrors, as the right one is busted by a jerk.the Right Window works IF we pound on the door panel, some times, like once in 20 licks.Test Light on Mirror Fuse 10A has no power at all, don't know if that is because Mirror Switch is not depressed or ??I am a retired Electronics Tech, just need some Schematics for this truck.thanks in Advance.John in OkieLand jtcraigjr@ G mail dot com

I recently tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my jcb 3cx site-master. It would'nt move forward or reverse, engine was good both solenoids for forward and reverse worked, but still couldn't diagnose the problem. I don't have much technical knowledge but I just followed it step-wise, and now it works perfect! covers wiring, codes, diagrams, torque specs, PCV, everything got it from www.reliable-store.com

The issue is with the mode door. IT is inside the heater unit near the floor. The actuator or the door inside may have an issue.

Look on youtube ,video on replacing ignition switch and or ignition lock cylinder .

Do you know how to do scan tool diagnostic's ? Checking DTC'S - diagnostic trouble codes , viewing input data to the computers on the vehicle . The fuel sending unit is located inside the fuel tank ,it is a input to the PCM - engine computer . The PCM use's this fuel level info . to be able to conduct testing procedures for the evaporative emission system. The Evaporative Emission Control System (EVAP) is used to prevent gasoline vapors from escaping into the atmosphere from the fuel tank and fuel system. The EVAP system usually requires no maintenance, but faults can turn on the Check Engine light and prevent a vehicle from passing an OBD II plug-in emissions test.. Shorted sensors can cause all kind of problems .including bring down the five volt reference circuit inside the PCM . Also checking for DTC'S in the 4X4 control module should have been done before replacing parts . Your best bet ,take it to a qualified repair shop. Do you know which transfercase your vehicle has ? The NVG 246 EAU transfer case features a 4 button shift control switch located on the instrument panel. The BW 4482 transfer case features a 3-button shift control switch located on the instrument panel. Just replacing parts is not the way to a fix . Both systems can set a number of DTC'S DTC B0790 DTC B2725 DTC C0306 DTC C0327 DTC C0329 DTC C0359 DTC C0550 The NVG 246 EAU transfer case DTC B0790 DTC B2725 DTC C0300 DTC C0305 DTC C0306 DTC C0321 DTC C0327 DTC C0359 DTC C0374 DTC C0379 DTC C0550 Do yourself a favor ,have a qualified repair shop diagnose the problem . An you can't just replace the 4X4 control module an expect it to work .It needs to be programmed . Transfer Case Shift Control Module Reprogramming Remote Programming Feature Connect the scan tool to the vehicle. Power-up the scan tool and select the Service Programming feature. Select the appropriate vehicle. Press the Request Info button on the scan tool. Disconnect the scan tool from the vehicle and connect the scan tool to the computer station. Follow the menu select items for reprogramming and provide information as to what type of device you are programming and whether you are reprogramming or replacing the electronic control unit (ECU). Select "vehicle" from the selection menu. Select the module you wish to Program. Select "Normal" for Programming Type. Select the applicable software calibrations. Transfer data file to the scan tool. Reconnect the scan tool to the vehicle. Turn ON the ignition, with the engine OFF. Select the Service Programming feature on the scan tool. Press the Program button on the scan tool.

My wiring diagram only says "underhood", and also indicates that there's an I/P (interior/passenger)
relay box as well.
The cigarette lighter fuse in a 2003 Suburban is identified as a 15 Amp fuse.

Do you have a wiring diagram for TCCM ? The transfer case shift control module is equipped with the ability to store diagnostic information, which is useful to a technician in the event of module, component or wiring failures. This information can be retrieved from the transfer case shift control module by way of flash codes, which are displayed on the three transfer case shift control switch buttons. These buttons are located on the instrument panel to the right of the steering wheel Before obtaining DTCs, perform the following transfer case control module (TCCM) Self-Test. TCCM Self-Test Observe the transfer case shift control switch indicators while turning the ignition switch to RUN. A properly operating system will flash all indicators and then will return to the current gear. If the system is operating normally, then proceed to Displaying Codes. If the TCCM failed the Self-Test, then test the following circuits. • Battery Positive Voltage (40 and 1640), and Ignition 3 Voltage for battery voltage • Ground Circuit for ground • Diagnostic enable circuit for an open or high resistance • Transfer case shift control switch connector If the above circuits are normal but the TCCM still fails the Self-Test, replace the TCCM. Refer to Transfer Case Shift Control Module Replacement . Do you know how to test automotive electrical circuit's ? How to use a DVOM - digital volt ohm meter ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on driveline/Axle ,then under subsystem click on transfer case controls . Click the search button then the blue links . Do you know where the TCCM lives ? Check all power and ground's . If all are good , replace the TCCM .

Might want to check your brake pads

Do you have a phone charger plugged into the power socket? New cell phone? Laptop in the vehicle or any new camera, radar detector? Anything electronic can interfere with remote entry system

The distributor HAS to go back in the same position as the old one. If not, it will be out of timing and will not run correctly.(as you noted) You will have to remove the distributor and put it in correctly.

does it have auto hubs, if so check the vacuum switch at tranny side If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_4c166ba81493f541

Sounds like it's the heater core

bbbind.com has wiring diagram for your transfer case. I looked at it, but, couldn't get everything in one picture.