Top 10 1997 GMC Jimmy Questions & Answers

Firing order 1-6-5-4-3-2
------------
| 2 4 6 |
front | |
| ------- |
| | 6 5 ||
of | | 1 4 ||
| | 2 3 ||
| ------- |
vehicle | |
| 1 3 5 |
------------
Distributor rotates clockwise

I can tell you almost for certain your fuel level sending unit is bad, I have been able to fix them though. It requires removing the gas tank and then the fuel pump. You can if your inclined, bend the brushes on the small circuit board over more so they will make better contact on to it. Other wise its a new fuel pump assembly, check all plugs and wiring by unpluging and repluging them to insure no bad connect. It is possible it could be the guage itself, but in thirty years of fixing cars never had a bad guage

I believe it's the middle relay in the glove box. You should feel the relay click on when you turn the key's, but you only have 2 seconds.

po171 fuel injection system to lean bank 1 po174 same thing but bank 2 that could be the oxygen sensors

1995-97 4.3L MODELS and 1995-99 2.2L models



Fig. 5: The starter motor on later model 4.3L engines is retained by two long bolts

1. Disconnect the negative battery cable.
2. Raise and support the front of the truck safely using jackstands.
3. If necessary for access, disconnect the front exhaust pipe.
4. If equipped, remove the starter heat shield.
5. On the 2.2L engine, remove the brace rod from the front of the engine and the bell housing.
6. On 2.2L engines, remove the drivers side wheel to access the starter motor wires and the starter motor attaching bracket-to-engine bolt through the opening in the wheel well.
7. Disengage the wires from the starter solenoid.
8. On the 2.2L engine, remove the attaching bracket-to-engine mount bolt.
9. Remove the starter-to-engine block bolts. When removing the last bolt, be sure to support the starter to keep it from falling and possibly injuring you.
10. Carefully lower the starter and shims (if equipped) from the vehicle.
11. If necessary, remove the bracket (2.2L engine) or the shield (4.3L engine) from the starter assembly.
    

1. If removed, install the bracket or shield to the starter, as applicable. Tighten the bracket nuts to 97 inch lbs. (11 Nm) or the shield nuts to 106 inch lbs. (12 Nm).
2. Carefully raise the starter and shims (if equipped) into position in the vehicle and thread one of the retaining bolts to hold it in position.
3. On the 2.2L engine, loosely install the bracket-to-engine mount bolt.
4. Install the remaining starter mounting bolt, then tighten all mounting fasteners to 32 ft. lbs. (43 Nm).
5. Engage the wiring to the solenoid as noted during removal.
6. On the 2.2L engine, install the brace rod and tighten the retainers.
7. If disconnected for access, install the front exhaust pipe and tighten the fasteners.
8. If equipped, install the starter heat shield.
9. On 2.2L engines, install the drivers side wheel.
10. Remove the jackstands and carefully lower the truck.
11. Connect the negative battery cable.

First, tighten the bolts to 25 ft. lbs. (34 Nm).
Next, tighten the bolts to 45 ft. lbs. (61 Nm).
Finally, tighten the bolts to 65 ft. lbs. (90 Nm).

1. For the 4.3L engines which are equipped with screw-in type rocker arm studs with positive stop shoulders, tighten the rocker arm adjusting nuts against the stop shoulders to 20 ft. lbs. (27 Nm) on 1994-96 models and 18 ft. lbs. (25 Nm) on 1997-99 models. No further adjustment is necessary, or possible.
   
2. For most 4.3L engines which are not equipped with screw-in type rocker arm studs and positive stop shoulders, properly adjust the valve lash. For details on valve lash adjustment, please refer to the procedure in Routine Maintenance . (see below)

P0440 - Evaporative Emission Control System Malfunction

This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Symptoms: You likely won't notice any drivability problems.

Causes: A code P0440 could mean one or more of the following has happened:
The gas cap is not installed or working properly
The purge solenoid has failed
The canister is plugged and not working properly

Possible Solutions: With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
Inspect the EVAP system for cuts/holes in tubes/hoses
Inspect for damaged or disconnected hoses around the Evap purge solenoid
Check and/or replace the sensor
Check and/or replace the purge valve
Have a professional use a smoke machine to detect leaks

Hope helps.

Are you wanting a "torque sequence" for the oil pan? When in doubt, it is always best to start in the center and work your way out to both ends. If you have a 4.3L engine, that has an aluminum oil pan, it is not that big of a deal to begin with. Here is a picture anyway.

Driver side under the hood, fuse positions on the underside of the fuse box lid