1998 GMC Savana 3500 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1998 GMC Savana 3500

1998 GMC Savana 3500 Problems

Check Engine Light With Code P1870

Vehicles equipped whit a 4 speed automatic transmission may develop a harsh 1-2 shift and/or illumination of the Check Engine Light with code P1870 stored. This can be caused by wear of the bore for the TCC isolator and regulator valves in the valve body. This condition does not commonly occur until the transmission reaches normal operating temperature. If the valve body is worn, replacement will be necessary to correct this concern.

Check Engine Light and Misfire Due to Stuck Fuel Injectors

One or more fuel injectors may become stuck closed causing an engine misfire  and the Check Engine Light to illuminate. Our technicians tell us that this problem can be caused by some fuel additives. There are special procedures which may be able to restore the affected injector. If this fails the affected injector must be replaced.

Alternator May Fail and Cause Noise and Dead Battery

The alternator may fail causing the battery to go dead. The charge light on the dash may or may not illuminate. The alternator may also develop an abnormal noise. A failed alternator will require replacement.

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1998 GMC Savana 3500 Questions

Where is the fuel filter? Also where is the fuel pump? Thanks! (1 answer)

It is also a diesel. It's not turning over and there is no fuel smell, could it be just the fuel filter or could it be something else. Thanks again.

Auto transm does not shift into high gear when the light in the shift indicator (1 answer)

is out. When engine is warm the light goes on and the transm goes from low to high gear.
car will not go over 35mph when light is out

Air conditioner doesnt work (1 answer)

3 Mechanics cant find whats wrong with 2 air conditioners in my 1997-98 GFMC Savana short school bus.3500.I bought the short school bus and converted it in to a vending bus by taking out all seats and put in cabinets shelving etc...There's one air conditioner of course that is part of the tru...

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1998 GMC Savana 3500 Recalls

Handicap Conversion Vehicles: Wheel Chairs Not Secure In Retractors

The retractor that secures a wheel chair in a handicapped conversion vehicle may be ineffective. Dealers will inspect and replace the wheel chair securement retractors as necessary to resolve the concern.

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