20 Most Recent 2005 Pontiac Bonneville GXP Questions & Answers

Take the engine mounts loose you can usually gain enough room

Back in those years GM had problems with stepper motors in the clusters going bad. Here is a video on how to repair the problem .An you can get the part on eBay ! How to repair GM Instrument Cluster Speedometer Gauge Stepper GM Stepper Motors x27 168

Try using a screw driver to reach the hood release under the hood. You may need to pry the hood up a little to reach it. The electronic release is there as a secondary latch for safety. You can still open it up if you can get to the manual release.

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Look at the modulator on the side of the transmission. It's probably gone bad.

no tcm its part of the pcm https://www.2carpros.com/questions/tcm-45767027

If you have the 3.8L First check the basics . Do you have spark ? Fuel Injector pulse ? My guess is that the ground connections under the coil assembly .are not tight . Very common problem that occurs during a water pump repair . Good luck

It is #3 in the picture. You should be able to get at it in the engine compartment.

With a monitor scan for the knock sensor defect or no signal from PCM should have around 5volts. Check Ignition key on engine off. With a piece of metal hit near the knock sensor and the voltage have to change normally. Also, the EGR valve not working or clog. For the hot engine Radiator cap defect or Electrical fan not working when hot. The radiator flush can be done if restrictions. hope it helps.

Check for a bad fuse

this sounds like 1 of 2 possible problems.
a bad headgasket or a clogged catalytic convertor. i would lean more towards the convertor

Your vehicle has two cooling fans controlled by three relay's which are energized by the PCM/ECM - engine computer . Does your vehicle have A/C ? Does it work ? Turning on the A/C the fans should come on low speed , do they ? Does the vehicle overheat ? Any code's stored in the PCM/ECM ? Relay Driven Dual Cooling Fan Diagnostics

Many things could be your problem. 1- light bulbs (most common) 2- no ground or B+ 3- defect fog lights switch You have to find out with a test light or meter. At the fog light connector. See if you have B+ and good ground. If yes then the bulb is the defect.

Looks behind the gloves box compartment there is an LCM module that controls the headlamps and lights, in general, unplug the connector and you will probably find bad wires terminals that are burned. this is your problems with turn signals and headlights hope it helps.

GM gages are famous for this type of failure, have the cluster rebuilt.

Please follow the link for help https://www.gmforum.com/everything-electrical-electronic-108/2005-gxp-blower-motor-dead-277509

The fuse box diagram can be found in the owners manual. If no owners manual is available, check on line by entering your vehicle year and info and fuse box diagram. Just type it into your browser.

Without testing we'd only be guessing , could be the control module ,electrical input to the control module , switche's etc... don't know what year so can't direct you in any testing proceduers .

plug gap is 35 mm