20 Most Recent 2005 GMC Sierra 1500 Hybrid - Page 2 Questions & Answers

Horsepower gains for 5.3 L or 4.8 L V8
Cold air intake. (5-15 horsepower)Such as Volant, K&N, Airraid.
Chip, programmer, or a custom tune.(10-15 horsepower)
Exhaust(Realisitcally 1-5 horsepower)
Headers(5ish horsepower)

It is located on the front of the engine.It has large hoses going to it.

I have been told by a mechanic that the fuel filter is inside the fuel tank. Have to either drop the tank or remove the pickup bed. Access is on the top of the tank. This is poor engineering.

In the Uk nearlly all trailor socket wiring is done from the rear light wiring of the towing vehicle so I suggest checking the wiring back from the trailor connection socket and also socket, it could be a broken or cut wire. Also will probably find your vehicle a control unit fitted the trailor socket which could also the problem. Find the pin outs for your turn signal on the socket and connect a bulb across this connection and the common earth to check its not a fault on your tralior.

Check under the hood to see if your throttle cable is stuck.

Sounds like the oil sending switch is shorted out to ground,also could be broken or worn out.Its only a 5-10$ part.Unless you can test it.

That is contained in the factory service manual, the manual is copyrighted and not available for a free access download.

Sometimes they fill with water or accumulate moisture. Life span varies on these things. Some last forever, some die in a few years. Seems to be a common GM problem

Check fuses, votage at motor wires and motor itself.Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer. Thank you for using FixYa, have a nice day.

This transmission is shifted by a computer via electric solenoids that open and close hydraulic fluid pressure passages when signaled by the computer control, so any kind of a problem with the external wiring harness to the valve body or the valve body wiring harness or the PCM (powertrain control module can cause this symptom. The most common cause of your particular problem is a damaged open or shorted shift solenoid, this causes the transmission to go into two gears at once, the computer senses this and shifts the transmission to neutral to stop any damage to the transmission.

This is caused by either a poor ground connection to the head lights or an overcharging condition taking place in the voltage regulator of the alternator, the spikes in output voltage causes the head lights to brighten up.

The information below was complied by me, it explains what causes the check engine light to come on and the process of finding the cause.

When the Check Engine light (or Service Engine Soon or small picture of an engine) is turned on, the systems computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible system faults (the gas cap is just one of them) that turn the Check Engine light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen/Oriley and Autozone parts stores (USA only) do this testing for free.

There is no such thing as a reset, if the light stays on a fault exists in the 4X4 control system, the control module has sensed that and turned the light on to alert you to the problem. It is likely that the power transfer case actuator motor is the problem or the wiring to it.

adjust the (IIA) integrated ignition assembly to proper degrees.

Sometimes the blend air door actuators get stuck. You can usually free them by "cycling" the temperature control. For instance, If you have the control on HOT but you are getting cold air, turn the control to COLD and wait about one minute, then turn it back HOT. If this does not work, then you probably have a bad actuator on that side.

Fortunately, the driver's side actuator is pretty easy to replace. Just look up under the dash on the driver's side. The actuator is attached to the bottom of the air box. You will have to remove the lower trim pnels to see it. (See #9 in the Picture)

check out the sender or relay