The pitman arm and/or lower ball joints may wear causing loose steering and alignment issues. Replacement of worn components will be necessary before the alignment can be properly set to specification.
Resources for the Repair and Maintenance of your 1990 GMC Suburban 2500
1990 GMC Suburban 2500
1990 GMC Suburban 2500 Problems
The distributors can go bad and set a trouble code; they should be replaced.
Faulty glow plugs and incorrect wiring to the glow plugs have been known to cause "hard start" problems.
Our technicians highly recommend that the transmission is serviced every 30,000 miles to avoid problems and maintain optimal operating order.
A coolant leak may develop form the Intake manifold gasket causing overheating complaints. The coolant leak may be internal allowing coolant to mix with the engine oil, this condition can result in internal engine damage. Be aware that this problem is often mistaken as a blown head gasket.
1990 GMC Suburban 2500 Recalls (Recent)
Summary: THE RECLINER MECHANISM AND THE SEAT FRAME MAY HAVE FOAM AND/OR VINYL BETWEEN THEM, CREATING A "SOFT" JOINT. THIS "SOFT" JOINT RESULTS IN LOWER THAN SPECIFIED BOLT TORQUE WHICH LEADS TO JOINT LOOSENESS, CAUSING BOLT FATIGUE AND EVENTUAL BOLT FAILURE.Learn more »
1990 GMC Suburban 2500 Questions and Answers
Rough idle under no load, and roughacceleration.