Q: Throttle is not responsive - 2003 GMC Yukon

asked by on

whenever I accelerate in first gear it holds it for a couple seconds with higher rpms before up shifting. I already changed the spark plugs and cables. my truck shakes when I step on it but only in first gear, after that I have no issue. I scanned it and only shows me code p0300. random misfire on one or multiple cylinders. I cleaned out the throttle body and still nothing. that's the only code I get. another problem is the oil temperature needle is stuck at 80. do I need to change the oil sending unit sensor? please and thank you for your time to reply.

My car has 190600 miles.
My car has an automatic transmission.

Hi there. From the description your vehicle only shakes in first gear, with delayed upshift seems unusual. Assuming the P0300 code is continuing to return, it leads me to believe you may have a fuel delivery issue. Low fuel pressure could be a faulty fuel pump. It could also, be a leaking fuel pressure regulator. This may be why you only feel the problem in first gear and the fuel pressure regulator not leaking bad enough to feel it in higher gears.

The oil pressure gauge stuck at 80psi all of the time is most likely the gauge at fault. This is common with GM vehicles. If the gauge is only stuck with the vehicle on, the oil pressure sending unit could be at fault. If you need to have this taken car of, a certified professional from YourMechanic can come to your car’s location to diagnose the unresponsive throttle and advise you on the best actions.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Throttle is not responsive - 2003 GMC Yukon

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fuel pressure regulator needs replaced.

Hi there. To remove the fuel rail, simply remove the bolts that secure the rail onto the intake manifold and all of the brackets off the rail. Take a pry bar and gently pry up on the fuel rail to...

Q: My transmission seems to be slipping or something else...?

This may be a simple adjustment to the throttle kick down on the transmission. It may be out of adjustment or there may be a problem with the shift solenoids in the transmission. The kick down is a simple adjustment...

Q: Ran out of gas and put in diesel by mistake. Dealership drained the gas and changed the fuel injectors. Then they cleaned the system and now it has lost compression.

Hi there. Take a compression gauge and put it into the spark plug holes and remove all the other spark plugs. Then disable the ignition power to the coils. Then crank the engine over with the throttle open all the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...