The signal control is mounted in the steering column. It is an integrated unit, meaning that it also has the controls for the hazard flashers and cruise control (if you have cruise.) In order to access it, you will need to pull the steering wheel (moderate pain in the ass), and pull out the lower panel of the dash (slightly bigger PIA due to the close quarters.) The other catch is the e-brake cable, which is a drag to get off of the dash. Not all that hard, just time consuming. I replaced my signal control, and it took about 2 - 3 hours. I got the replacement from a junkyard for about $50. I had to buy the whole steering column, but it was a good deal any way you cut it! Get a good manual to help with this task, and PLEASE be careful with the airbag! It'll put a hurt on you if you trifle with it. Hope this helps - Mr. Dog
The cause for a turn signal flasher to keep clicking on a 1999 GMC Jimmy is a bad flasher unit. Replacing this with a new flasher unit should solve this problem.
Most likely the turn signal flasher.
the turn signal flasher is under the dash panel below the radio,must remove lower hush panel and center panel.gmjim
The 1998 GMC signal flasher relay switch will be behind the drivers side dashboard. The signal flasher relay switch will be on the left-hand side of the gas pedal.
The turn signal flasher on a 2002 GMC Savanna van is behind the left IP fuse box. This is also the location for the hazard flasher.
it is located under the dash behind the knee bolster to the left of the cigarette lighter.
there are two flasher boxes under the steering columb to the right change the flasher it should be a two prong silver canister any auto parts store it's called a flasher
under you radio and behind the ash tray....u have two flashers ..one for the blinkers and the other for the signal lite
Check the 2005 GMC Envoys turn signal flasher. The flasher could have an intermittent issue causing the signals to not work.
it is pretty easy but time consuming. it is well hidden. it is under ac controls and to the left of the ashtray. you will need to take a lot of screws off.
Underneath Driver side dash kick panel
the flasher unit is directly behind the kick panel in the center (same panel that your cigarette lighter is in. it takes an Allen wrench and i believe a 8 mm socket to get to. you can interchange your emergency flasher and your turn signal unit to see if that is your problem. hope this answers your question. Mike
front or rear turn signals
If the bulbs check good, replace the flasher relay.
The light is made to flash with a plug-in flasher which is about an inch in diameter and and about an inch long. I should be located around the steering column about a foot from the floor. The actual turn signal device is located under the steering wheel. You must use a steering wheel puller to get to it.
Under the dash right hand side of the steering column ,appox. 2" square
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Sitting in the driver's seat, imagine a line drawn from your left kneecap straightforward until you are under the dash. There it is.
Well - it could be the turn signal unit in the steering column - if its a high mileage vehicle it may just be worn out. you have to remove the steering wheel and replace the unit - the part on a GMC is about $30 +/-. This may fix the problem.
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Because you need a new bulb.
I don't have a 99 GMC Jimmy