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2005 Crew Cab

mrkleen

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mrkleen Enthusiast

mrkleen

Posted
Posted

Hello All

I have a 2005 GMC 4x4 crew cab 5.3 with a 3.42 rear end and it seems a little slugish. I have put new plugs and wires (gm on both) and a new fuel filter, air filter is good. I do have a ses light on it is the knock sensor. A friend has about the same truck in a 06 and his runs much better. Have I missed something?

Spurshot Senior Enthusiast

Spurshot

Posted
Posted

Could be a lot of things. Injector nozzles would be worth cleaning, as well as the MAF, IMO.

mrkleen Enthusiast

mrkleen

Posted
  • Author
Posted
What rear end ratio does he have. If he has a 4.10 that would make it feel quite a bit better than your 3.42s.

 

 

same set up as mine but a year newer and about 20000 less miles

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
Hello All

I have a 2005 GMC 4x4 crew cab 5.3 with a 3.42 rear end and it seems a little slugish. I have put new plugs and wires (gm on both) and a new fuel filter, air filter is good. I do have a ses light on it is the knock sensor. A friend has about the same truck in a 06 and his runs much better. Have I missed something?

If I remember correctly, the knock sensor code will retard the timing because the truck thinks it is pinging (due to the bad sensor). This will rob power and gas mileage. I'd confirm the knock sensor is bad and replace it. I bet that solves a lot of your problem.

Rat4go Enthusiast

Rat4go

Posted
Posted
Hello All

I have a 2005 GMC 4x4 crew cab 5.3 with a 3.42 rear end and it seems a little slugish. I have put new plugs and wires (gm on both) and a new fuel filter, air filter is good. I do have a ses light on it is the knock sensor. A friend has about the same truck in a 06 and his runs much better. Have I missed something?

If I remember correctly, the knock sensor code will retard the timing because the truck thinks it is pinging (due to the bad sensor). This will rob power and gas mileage. I'd confirm the knock sensor is bad and replace it. I bet that solves a lot of your problem.

 

 

 

+1

mr_bots Enthusiast

mr_bots

Posted
Posted

I think pre-cat o2 sensors could be hurting too, I believe they can cut or add too much fuel if they think you're running too rich or lean. I'd do the knock sensor first since you have a code for that. Might speed things up if you unhook the battery for 10 minutes or so when you replace it to reset the code and reset the adaptive settings in the PCM then give it a week or so to relearn your driving style and engine behavior then compare to your friend's truck and go from there. Might want to get both knock sensors while you have the intake off and be done with it.

Draenor Senior Enthusiast

Draenor

Posted
Posted
Hello All

I have a 2005 GMC 4x4 crew cab 5.3 with a 3.42 rear end and it seems a little slugish. I have put new plugs and wires (gm on both) and a new fuel filter, air filter is good. I do have a ses light on it is the knock sensor. A friend has about the same truck in a 06 and his runs much better. Have I missed something?

If I remember correctly, the knock sensor code will retard the timing because the truck thinks it is pinging (due to the bad sensor). This will rob power and gas mileage. I'd confirm the knock sensor is bad and replace it. I bet that solves a lot of your problem.

 

 

 

+1

 

+ another

 

Fuel filter is in the fuel tank and is unserviceable??

 

:bs:

Thats what I thought when I read it too. :lol:

P'cola Denali Enthusiast

P'cola Denali

Posted
Posted
Fuel filter is in the fuel tank and is unserviceable??

 

:lol:

 

 

I don't know much about truck, but I thought the same when I read it.

 

Did you have speedy lube or some shade tree mechanic do it, or at least say he did it?

mrkleen Enthusiast

mrkleen

Posted
  • Author
Posted
Fuel filter is in the fuel tank and is unserviceable??

 

:lol:

 

 

I don't know much about truck, but I thought the same when I read it.

 

Did you have speedy lube or some shade tree mechanic do it, or at least say he did it?

 

 

you guys are correct I found out today that it is a nonservice part. Last time I had it serviced I told the guy (mom and pop place) to replace it I went back and looked at the ticket and he had a note written on it about the fuel filter. Now about the intake gasket does anyone have a part # on it(gm part only?)

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