Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Chevy Silverado and GMC Sierra Gasoline Engine Problems



  • robin17robin17 Posts: 1
    i have 2002 2500hd with 60k when taking off from dead stop it take along time to pick up speed but when u let off accelerator it will start to pick up speed but not that much replace spark plugs, air filter, fuel filter, and put new fuel pump in it.

    if any could help it would be great!!!
  • kingbrutiskingbrutis Posts: 1
    1996 chevy 3500 dually, 454 vortech, just put on new intake, radiator, themostat about 500 miles ago. I noticed there was oil in the radiator. I drained, it, flushed it, put that block sealer stuff in. Followed directions, filled it back up with water and let it run. The return hose from the motor is still flowing lots of oil. It's not showing any oil presher on the gauge. The oil is full on the dipstick. So whats next? Thanks joe
  • lpoincotlpoincot Posts: 1
    Hello robin,

    Have you had any respones to you post. I have a 2002 5.3 1500 with 125,000 miles and it does the same thing from a dead stop, but I still have driveability. I can still get to highway speeds, just takes a while.

    I replaced the fuel pressure regulator today, but it did not fix the problem. I tried to get codes from the system, but the reader will not connect.
  • redwing5redwing5 Posts: 2
    Hi all,
    2004 Silverado 2500, 6.0L, 2wd, automatic tranny, 74,000 miles.

    Last week while towing a horse trailer on a VERY hot day, the "reduced engine power" engaged. The manual explains this as usually being related to the cooling system, but the coolant temp read apprx. 210 degrees. After this happened I changed the air filter, oil filter and oil, tranny fluid and filter, drained and replaced the coolant.
    This morning (on a not so hot day) it did the same thing, again while towing.
    Other bits of info: I haven't done any other maintenance thus far. Original plugs, wires, fuel filter, pcv valve and so forth. The first time it happend the only symptom was "reduced engine power." This morning it also has the check engine light on, but again, the temp reads 210 range and the transmission temp is normal too.
    The fan is turning, (but I haven't checked yet to see if it increases with RPM.)
    Any suggestions would be helpful because I'm baffled. If the temp were up I'd be inclined to examine the rest of the cooling system but that's not the case.
    Thanks in advance. If so inclined I'll even take phone calls at 214-876-1217
  • redwing5redwing5 Posts: 2
    I believe I've found the problem. I had Auto Zone run the code scan for me (they do it free) and I got code P2135 which is "APP sensors 1 and 2 do not agree." From other research I've done on the internet I've discovered that A: the connector for the throttle position sensor sometime loses connectivity and needs to be cleaned and more importantly B: The yellow wire on that connector commonly breaks inside the insulation. From my initial examination it looks as if there's a spot that rubs near the oil fill tube and that could be the culprit. Since my problem has been intermittent (sp?) I won't be sure of the fix for a while, but I'll post back when I know for sure. Hopefully save someone else some time and money.
  • gmcboygmcboy Posts: 1
    does any one know any thing about the valve problems
  • obyoneobyone Posts: 8,065
    What valve problems?
  • jerryk2jerryk2 Posts: 6
    it will start but it is popping thru the air cleaner and some time it will let you rev it up to 3000 or 4000 rpm no problem and sometimes it will idle ok and will not rev up at all with out trying to die i have new wires and plugs and pcv valve not sure what eles it could be i put new fuel filter in also new pump like 2 mouths ago if any one has any idea please help me out before i have to take it to a shop does any one know what the psi should be on the fuel psi idle and on the gas
  • mine did similar problems, check your fuel pressure at the fuel rail. its on driver side just below the plastic cover. should be around 45-60 psi i believe. check o2 sensors, mine took a [non-permissible content removed], or your cats could be restricting exhaust from escaping. could of got bad fuel pump...? worth a look. my fuel pressure regulator also went bad which caused hard starting. which is also is on the driver side on fuel rail. good luck
  • randy45randy45 Posts: 1
    my 99 1500 4.3L idles rough/misfires when it rains and gets wet. accelerating hard will clear the problem. any ideas?
  • cac4cac4 Posts: 11
    I am looking at buying a 05-07 classic chevy/gmc 1500 5.3L truck. I have a few engine questions?
    When did they introduce the flex fuel and how do i tell which engine has this option?
    How do I tell the difference of the iron vs. the alum block.
    Is it in the serial #.
    Which one is better?
    I hav read some post that claim the iron is the way to go.
  • treedogtreedog Posts: 12
    I have a 2001 chevy silverado with the 5.3 litre engine,..It ran fine, up until today .The truck sat for 4 days and when i went to start it just starts and immediately stalls out, Also i noticed coincidently the remote door locks dont work and the dome light and door dinger isnt working either...It just keeps starting and stalling with or without the gas pedal depressed....Has anyone had this problem?
  • cajamacajama Posts: 4
    1- Sounds like the battery, if its screwed up it will fry the IAC which keeps the truck at idle. Change the battery and go from there.
  • treedogtreedog Posts: 12
    I have a 2003 chevy 1500 hd 6.0 litre,..w/ 93k miles...It is overheating quickly, i can start it cold and in 5 minutes its overheated,..The engine does not miss or run rough,it runs very smooth,The service engine light isnt on...There isnt any water in the oil, The water pump and thermostat are new,..the radiator looks very clean,..I cant find any water leaking from the block, heads or intake..And its not the temp gauge because the coolant is definately overheated...ive tried two different thermostats..Im baffled,..Can anyone help?..
  • obyoneobyone Posts: 8,065
    Both the waterpump and the thermostat could cause the problem you're describing. Think either one was defective?
  • treedogtreedog Posts: 12
    Well this is the second thermostat ive tried, so i doubt two would be bad,..And the water pump seemed fine outa the there any test i can do to check them without removal?
  • treedogtreedog Posts: 12
    o.k, i changed the iac and it still wont start, just starts and instantly stalls,any suggestions?...battery is about 4 months old,..the headlights and radio work fine....
  • obyoneobyone Posts: 8,065
    It went from overheating to a non-start issue?
  • treedogtreedog Posts: 12
    Update: ok well i found the problem, We've had 4 days a flooding rain in Forida this week from tropical storm Fay, I guess mice or some type of rodent went looking for higher ground and decided to make there new home under my dash ,..Several wires were chewed in half..Fixed the wires and that fixed the problem..We are up and running again....Thanks..
  • treedogtreedog Posts: 12
    No, i have two trucks ,..Notice one is a 2001 w/ 5.3 litre....and the overheating truck is a 2003 1500hd with the 6.0litre....i just fixed the 2001 5.3...Still need help with the overheating 6.0 litre though...
Sign In or Register to comment.