20 Most Recent 1989 GMC S-15 Jimmy - Page 7 Questions & Answers

In my opinion, the problem is the blower motor. The bearings or bushings are wore out.

yes and it has been the only option all along could be the injector seals , faulty dribbling injectors , injector control and excessive fuel pressure from a problem pressure control valve

Change transmission filter.

I could be wrong(it would not be the first or last time) but in your vehicle i think what you call the DRL relay IS the DRL module. By the way if you need to know something about the electrical system in a vehicle (especially GM) don't go to Haynes. They try to pack several years of vehicles in one book and that does not work well. If you want good info on your vehicle, go to your GM dealer and tell them you want to read the manual. They don't advertise it, but they are supposed to give you free access to the information. They will let you look, but will charge or not allow photocopying(depends on the dealers mood) of the material. You can write down all the notes you wnt!

Have to use a coolant system pressurizer, which can be borrowed for free at one of the chain automotive stores. It attaches to the top of radiator where the cap is. Pushes air through the system, and should find your leak. Popular places to look are the bottom of the water pump, radiator itself, and the overflow tank. Overflow tanks can crack on bottom side, hard to find without this pressurizer.

Add water and use a radiator pressurizer to locate source of leak.

code p 0300 is random misfires and it is mainly from low fuel pressure regardless of the make of car the pressure has to be no less than 45 -65psi check the fuel pressure regulator the next thing could be a problem ECM unit so substitute it with a known good one and see what happens

The way to find the problem is electrical testing for the componets that are not working or not working correctly . If someone had the dash a part I would look for a lose connection somewhere ! Finding a wiring diagram for the componets not working . Look to see if wire's share a connector behind the dash or maybe these componets share a common ground . Do you know what a wiring diagram is ? How to use a wiring diagram ? How to do basic automotive electrical testing ? How to use a DVOM - digital volt ohm meter ? Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts How to Use Multimeter to Troubleshoot Common Problems Automotive Electrical System Basics EricTheCarGuy

Did you hook it up correctly ? Do you know how to do automotive electrical testing using a volt meter . Fuel pump electrical circuit diagnosis no fuel pressure testing GM

What sensor did you change . VSS - vehicle speed sensor or output speed sensor . The ideal what to find the problem would be to hook up a factory scan tool to see the VSS is put out a signal to the PCM/ECM , then see if the PCM /ECM is sending info to the instrument cluster ,. And knowing how these this work couldn't hurt either . The IPC displays the vehicle speed based on the information from the PCM. The PCM converts the data from the vehicle speed sensor to a 4000 pulses/mile signal. The IPC uses the vehicle speed signal circuit from the PCM in order to calculate the vehicle speed. The speedometer defaults to 0 km/h (0 mph) if a malfunction in the vehicle speed signal circuit exists. Have the vehicle checked for DTC"S - diagnostic trouble codes . No all code's turn on the check engine light . DTC P0608 The PCM creates the vehicle speed output signal by pulsing the circuit to ground. The PCM pulses the circuit at the same rate as the vehicle speed signal input. The PCM monitors the voltage on the vehicle speed signal circuit. If the PCM determines the voltage is out of the normal operating range, a DTC sets. Install a scan tool. Raise the vehicle's drive wheels. Refer to Lifting and Jacking the Vehicle in General Information. Start the engine. Place the transmission into drive for an automatic transmission or third gear for a manual transmission. With the scan tool, observe the Vehicle Speed Sensor parameter in the PCM data list. Does the Vehicle Speed Sensor parameter match the speedometer display? This is something best taken to a qualified repair shop . This could be a wiring issue , or the PCM or the instrument cluster .

It is near the thermostat housing.

The filler hose connecting the filler nozzle to the tank may be blocked (may be twisted, bent or something got into and blocking it). Get under the truck and carefully check the hose - you may have to replace it.

If your wipers are controlled by the stalk on the left side of the steering column, along with the high/low beam switch, I would suspect the multifunction switch as the culprit (that's the switches contained as a unit in the base of the stalk).

Does the truck start?

If the vehicle moves and shifts properly at each forward drive setting, then the linkage is probably not the problem. However, you should check the shift cable at both ends as you get someone to shift through the positions. If the cable and linkages are OK, the problem is probably in the transmission.

Check the spark when the no start happens again.

If you have the spider fuel system, it is noted for problems. Use a fuel pressure gage, 60--66 psi, to get it to start. Did you check for spark at the plugs? Any applicable trouble codes? There have been service bulletins about cold start up problems, in the morning, after it starts it usually does fine the rest of the day, poppets need cleaning.

lots of people have 2001 gmc jimmy so can you be a bit more specific as to why you are on the fixya site if you want assistance with a problem