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Comments
If anyone has any ideas I would appreciate it.
Thanks in advance!">
The dealer fix is the complete fuel pump and sending unit as a single unit. Note that the new fuel level sending unit shows empty much sooner than the old unit. The fuel is still there, it just lies to you.
Naturally, the tank was over three quarters full. They charge to transfer the fuel to a storage container and lower the tank to gain access to the opening for the unit.
An independent shop is likely to replace just the fuel pump for less total labor.
Hopefully the gauge issue is an electrical ground deal. Could also be what the fuel pump issue is too.
I don't remember what the exact cost was, but it was significant.
I would do independent shop.
As it is, I had a transfer-flo tank installed in my newer truck and that becomes a non-dealer issue to start with. Actually, I don't think the whole transfer-flo upgrade was much more costly than the fuel pump deal on the '98. 45 gallons instead of only 26 helps get past the high prices in the boonies. Something to consider since you are facing the repair.
Both are inexpensive and relatively easy to replace.
My best recommendation is to take the vehicle to your local GM dealership to be diagnosed. Please keep me posted.
Thank you,
Caron, GM Customer Service
P1516 Code:
Chevrolet: Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
GMC: Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
The Throttle Actuator Control (TAC) / throttle body type trouble codes, may be caused by a loose wiring crimp at the throttle body connector, or a broken throttle body circuit.
saved me buying a third pump but cost me my right arm for the mechanic to diagnose and replace the wire
Sounds expensive to diagnose and fix as I know there can be many different causes. Any ideas or has anyone else experienced the same problem?
Thanks
Jim
I apologize for your frustrations. I would recommend speaking with the dealer to have the vehicle diagnosed. Can you please update me on your progress as well as send me your information (VIN, current mileage, dealer etc.). I look forward to speaking with you.
Christina
GM Customer Service
Thank you for your response, my truck is at Steve Schmitt GMC Chevrolet in Litchfield, IL. I currently don't have my VIN number handy, the truck has 150,000 mi on it. So far as of today they think that it might be the fuel injection pump. Unfortunatly they may not have it done till Monday, I need it tomorrow so I can continue my trip as I deliver new 5th wheels and travel trailers for a company out of Indiana. I was on my way to Texas when this problem occured. I just bought the truck one week ago today and traveled 500 miles when it broke down.
Thank you again
Randie
Thank you for your response. Please let me know how things go at the dealer. If you would like to email me directly with the information when you get it, I would be happy to look into this. You can also find the VIN on any insurance papers you may have. Thanks!
Christina
GM Customer Service
Randie
and have you checked the mass air flow sensor? It should be on the 3-4" tube that connects from the air box to the intake(?) and look like a plastic credit card holder sticking off the side. Do a 'tap' test when you start it from cold and see if it cuts out. This killed me in diagnostic time on a couple GMs the first time I encountered a bad one. They have a tendancy to cut out only when hot. If you were inthe air filter box you could have flexed, cracked, unplugged the sensor.
I may have the same problem as you have, i also installed a new pump and can only make it work with a 12 volt jumper, looks like i only have 5 volts at pump but i do have 12 volts leaving the fuse pump, did you come up with anything?
Thanks in advance
I may have the same problem as you have, i also installed a new pump and can only make it work with a 12 volt jumper, looks like i only have 5 volts at pump but i do have 12 volts leaving the fuse box, did you come up with anything?
Thanks in advance
I was almost ready to change the contol module because that is what controls the fuel pump but i did have 12 volts at the 20 amp fuse that was not getting to the pump.
2. Hook up all matching colors left.
3. There are 2 wires left that do not match, hook those up.
This was used for a 1999 sierra 4.8 with replacement fuel pump from O'reilly's Auto Parts.
If this helps, feel free to say it worked for you! I hope this solves alot of your problems.