20 Most Recent 1998 GMC Sonoma Questions & Answers

Question edited for clarity. Question moved to model category. In the link https://www.google.com/search?q=1998+gmc+sonoma+2.2+firing+order ..

Fixing the wiring to a tail light on a 1998 GMC Sonoma typically involves a few steps. Here's a general guide on how to fix the wiring:

Check the Bulb: Start by checking the bulb. If the bulb is burnt out, replace it with a new one. If it's still not working, move to the next step.

Check the Fuse: Check the fuse for the tail lights in the fuse box under the hood or in the cab. If the fuse is blown, replace it with a new one of the same amperage.

Inspect the Wiring: Inspect the wiring between the tail light and the fuse box for any damage or breaks. If there's damage, you may need to replace the wiring.

Test the Circuit: Use a test light or a multimeter to test the circuit. Start by connecting the test light or multimeter to the positive wire (usually red) and then touch the negative wire (usually black). If the test light illuminates or the multimeter shows a reading, the circuit is working.

Check the Ground: Check the ground wire (usually black) for any damage or breaks. If there's damage, you may need to replace the ground wire.

Fix the Wiring: If you find any damaged or broken wiring, repair it using wire connectors or electrical tape.

Reassemble: Once the wiring is fixed, reassemble everything and test the tail lights.

If you're not comfortable working with wiring or if the issue is not resolved after these steps, it's best to take the vehicle to a qualified mechanic or electrician for further diagnosis and repair.

Let's say that the battery and it's cables are good and charged and tight. and clean. You walk up and unlock the car and get in and close the door ( is the security light on? ) if it is can you put in the key and turn it on and does the security light go out? If it does'nt then you'll need to reset the security system. The GM way. With the doors all closed and the driver window down, reach in and turn the key to start and let go. the security light will be on steady, between 10 and 15 minutes it'll be out. Turn the key off and turn it back on and the security light will be back on, agian wait till it goes out. Again after it's out turn it off and wait a sec. and turn it back on, the light will come back on. again wait till it goes back out. this time ( the third time ) turn the key off wait a sec and then turn it to start and if everythings alright it'll start right up or crank OK and you'll have to finde another problem but the security system is'nt going to be it. If you battery is'nt good enough to do this you need a new battery anyway and your going to have all kinds of troble till you chcnge it.

I think you may have a dead cell in you battery

Does the vehicle have ABS - anti-lock brakes ? Sounds like a master cylinder problem .

If you have a check engine light, that means there's a trouble code stored. Get the code read and that should give you an indication of where to start

I think you should go for manual first after that it would be easy for you to solve your problem. I had visited this site past 2 months before for my vehicle and find it quite helpful may be you will also get something useful here GMC

Check the connector and wires going to the coil.

It's the vent valve, and it's connected to the charcoal canister near the rear axle. Might be on top of the tank.

016 Engine Misfire Misfire Scan Data Find someone who knows what scan data is an knows how to use it .Intake manifold vacuum leak . Rough Running When Cold GMC Yukon

Dude messed up your wiring. Have the dude fix it properly.

Why would the wires need replacing. You can avoid a lot of extra work by just replacing the battery clamps (terminals). Just make sure the polarity is correct (Red is +, Black is negative ) Always connect the negative wire to the battery post last to prevent arcing. Wear safety glasses when working with batteries as an explosion hazard is present. Use conductive grease on battery post to prevent corrosion.

What's wrong with it , have you had it checked for DTC'S - diagnostice trouble codes . The design of the passlock™ system is to prevent the vehicle operation if the proper ignition key is not used in order to start the vehicle. The mechanical key, in normal operation, will turn the passlock™ lock cylinder. The passlock™ sensor will relay the passlock™ data to the body control module (BCM). The BCM will determine the validity of the passlock™ data. The BCM will send a code password to the vehicle/powertrain control module (VCM/PCM). When the VCM/PCM receives the correct code the VCM/PCM allows the fuel injectors to operate normally. The passlock™ system requires the VCM/PCM and the BCM to communicate the various functions in order to operate. These functions transmit over the class 2 serial data line CKT 1807. For an explanation of the class 2 serial data operation refer to Data Link Connector Circuit Description in Wiring Systems. Telltale Indication Condition ON constant for 3 seconds, then OFF The bulb check occurs upon power-up (Ignition 1 and crank). ON constant for 3 seconds, OFF momentarily, ON constant/ignition OFF DTC (current) is set with the ignition ON (see DTC B2947, B2948, B2957 and B2958). ON constant/ignition OFF The TBC fuse is open or an open in CKT 1140 ON constant for 3 seconds, FLASH for 10 minutes, then OFF Occurs when a Passlock™ sensor has been replaced and the ignition switch has been turned from the OFF position to the CRANK position. This sequence occurs 3 times. FLASH with the ignition ON The Passlock system is in a tamper mode (see DTC B2960 and B3033). ON constant for 3 seconds, OFF momentarily, then ON constant for 10 minutes, then OFF Occurs when a new BCM or a new PCM/VCM has been installed, and the ignition switch has been turned from the OFF position to the CRANK position. This sequence occurs 3 times. ON constant for 3 seconds, OFF for 2 seconds, then ON constant The IPC is unable to communicate with the BCM. DTC B2947 Security System Sensor Power CKT Low DTC B2948 Security System Sensor Power CKT High DTC B2957 Security System Sensor Data Circuit Low DTC B2958 Security System Sensor Data Circuit High DTC B2960 Sec Sys Sensor Data Incorrect but Valid DTC B3031 Security System Controller in Learn Mode DTC B3033 Security System Indicates Tamper . Your best bet , take your vehicle to a qualified repair shop .