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Resources for the Repair and Maintenance of your 1999 GMC Jimmy

1999 GMC Jimmy

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1999 GMC Jimmy Problems

Brakes -- Verified

The Anti-lock brake system (ABS) control unit may fail internally causing the ABS warning light to illuminate.

Heating & Air Conditioning -- Verified

The heater core under the right side of the dashboard may leak engine coolant which can puddle on the passenger front floor. The loss of coolant may cause an engine overheating condition. Our technicians tell us that removal of the dash board is necessary to replace the heater on these vehicles.

Engine -- Verified

The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.

Drive Train -- Verified

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.

Exhaust & Emissions -- Verified

A Loose or worn gas cap may cause Check Engine Light to illuminate.

1999 GMC Jimmy Questions and Answers

geoops0105, 1999 GMC Jimmy, Jefferson City, MO

this is no error code but this truck dies every now and then especially when the whether is hot.and after less than one minute it will start up again only to die again.

dwpatte, 1999 GMC Jimmy, Citrus Heights, CA

is there a relay or a switch I may be able to locate that would cause my brakelight on one side to quit working? my turn and flasher signal still work, they use the same element as the brakelight.

gumbie37, 1999 GMC Jimmy, Jeddo, MI

I own a Jimmy and it is always slipping into overdrive (revs up to 3 on gage ) then it quits and drives normal- it does this alot , what is the issue - is it a speed or overdrive sensor - also gas...

jbdiamond, 1999 GMC Jimmy, San Anselmo, CA

Your estimate for my 99 Jimmy Heater Core Replacement of up to $270 is so grossly incorrect it isn't even funny. I have called 3 places for quotes and the LOWEST quote is $1100!

KmacD, 1999 GMC Jimmy, Avalon, CA

My driver door has dropped due to weight, and won't close properly. How can I repair this so that I feel safe in my Jimmy again?

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1999 GMC Jimmy Reviews

got my jimmy in march had some problems with 4 x4 replaced the 4x4 computer moduel located inside by passange door had no problems mine also tends to rock had to replace front end n shocks other than that ita a good buy

I have a 99 GMC Jimmy and it has been great. I carry a ton of sports gear in the back at all times. It tends to rock rather bad when I am driving on the interstate, but that is probably just the suspension from all the gear. The only big problem I have had is the 4x4 electrical buttons are all on and my 4x4 no longer works which is a bummer and my Jimmy acts like it wants to switch into 4x4 sometimes but other than that its a great SUV

Have owned for six years, although I hear people talk about all the problems they have had I have not had any problems. Fun to drive. Wish they still made them, would love another.

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