Question about 1996 GMC Sierra

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1996 1500 Silverado V6 4.3 gas mileage.

Is there anything I can install to get better gas mileage with this truck? I have heard about throttle body spacers, but don't know if they actually work, is there anything else?

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For better freeway mileage a low back pressure exhaust will help, also run tires at max pressure, this is around 45 PSI, in town there is little you can do.

Posted on Sep 29, 2009

Testimonial: "Thanks for the advice, I didn't know about the low back pressure exhaust system, I'll try it out."

  • lance mara Apr 02, 2012

    i am running an AirRaid intake w/a throttle body spacer. performance on the torque side was immediately noticable, but gas mileage didn't change.

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    yadayada Apr 02, 2012



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I took my 89 1500 to walmart had them clean the injector it gave me 10 more miles to the gal.

Posted on Jun 20, 2010

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1 Answer

Why is the motor stalling when putting AC or defrost on.

Hi Karen, easy easy, think you already read one of my fixes for this on another post...... Clean your throttle body with the battery disconnected. Will fix your problem, need to clean the Throttle body at least once a year. You'll get better gas mileage too.

Mar 11, 2015 | 2005 GMC Envoy SLT

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Whats the advantage of a cold air intake on a 2002 Chevrolet Silverado 1500 5.3L

Installing a cold air intake kit like a K&N or Airaid will actually do both, give you a horsepower gain and better fuel mileage. you will notice better throttle response and you will not need to give it as much throttle to go the same speed as before and therefore you should see an increase in gas mileage(if you dont go hotrodding around!).

May 08, 2014 | Cars & Trucks

1 Answer

Dealer says code P0506 for my check engine light and that it is caused by air pump emmisions

Just my opinion, but dealer is blowing smoke up there! Clean your throttle body. This is idler control code. It is VERY common for our TB's throttle body to gum up and get clogged with carbon, because we don't have a pcv system. Disconnect the battery, clean the throttle body, best done if you remove the throttle body. You can even re-use the plastic o-ring/gasket many times over. I find that using Seafoam to clean with plastic bristled brush is the best. Seafoam is sensor safe and cost about $9 a can. Look up on the TUBE, there are many videos there showing how to clean a Trailblazer/Envoy throttle body. Very easy and inexpensive. After that's done, clean that throttle body at least once a year. You'll get better gas mileage with it clean.

Jan 25, 2014 | 2006 Chevrolet Trailblazer

1 Answer

Engine revs up without using accelerator and also in park. Will also stall.

This happened to me with my old car. It ended up being a dirty throttle body. Take of you air intake from from the throttle body manually open and close the throttle and clean it. I used intake cleaner and a tooth brush and it worked awesome even got better gas mileage.

Jun 18, 2011 | Hyundai Sonata Cars & Trucks

1 Answer

My 2005 envoy stalls when i run the heater and a/c

It will tend to stall when you have the A/C on and or the defrost, not the heater correct? The defrost uses the A/C to dry the air. The battery was probably disconnected or changed recently. Clean your throttle body with throttle body cleaner while the battery is disconnected. When finished, drive around for 5 miles or so with the A/C and Defroster off. Your computer will relearn the the newly cleaned throttle body. This will fix this very common problem. Will cost you about 7 bucks for the cleaner and you're gas mileage will be better.

Dec 24, 2010 | 2002 GMC Envoy

1 Answer


Easy one, around $7 to fix. The battery was recently unhooked right? Clean your throttle body (should be shiny) with throttle body cleaner ($7) while the battery is unhooked. Perferred method is to remove the throttle body, but can be done without removing it too, just won't be as clean as it could be. After you're done, drive the car around for 5 miles or so, your problem will be solved, and you'll get a little better gas mileage. Very common problem with TB's.

Dec 16, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

How do you get to the back 3 sparkplugs

The 2001 Dodge Caravan with the 3.3L has absolutly no clearance above the intake - I have replaced these by removing the intake and throttle body - be sure and place a cover, rag or something to prevent anything from falling into the engine. Rear plugs can then be accessed fairly easy. While intake is off, clean it by introducing a can of foaming engine cleaner - make sure all sensers have been removed before hand. Clean throttle body and idle solenoid with carburator cleaner. Idle solenoid can be removed for better axcess but do not remove TPS throttle position sensor - this is in direct line with the throttle plates. Wash out all carbon and gas deposits. Take your time with the gaskets and you will be greatly rewarded with improved gas mileage and idle control. When replacing the plugs, put antiseze on threads to make them easier to install and remove next time.

Sep 27, 2010 | 2001 Dodge Caravan

1 Answer

My 2000 silverado will not start after i turn it off

This is because your throttle body is dirty. What you are doing when you give it gas is just giving it air the computer gives it gas. Clean around your butterflyin your throttle body so air can get by without stepping on gas pedal That will fix it.P.S only use throttle body cleaner to do this,they sell it at any auto part store.


Feb 17, 2010 | 2000 Chevrolet Silverado 1500

2 Answers

Very Poor Gas Mileage on 1997 Chevy Silverado

I would do the usual tune-up stuff first.. plugs, wires, cap, rotor, filters, PCV valve, etc. Try to avoid aftermarket parts if possible. You may pay a little more for OEM GM / ACDELCO parts, but my past experience showed me it's not worth the aggravation.

I'm guessing this is a TBI. The throttle body may be getting gummed up. This is a pretty common issue with the 4.3 & 5.0 / 5.7's. Even the thirsty big blocks were prone to this. Pick yourself up a base gasket while you're at it, and a can of "Berkible 2+2 gum cutter". Wear rubber gloves when using this stuff (don't worry, it's "sensor safe"). Remove the throttle body and when you turn it over, you'll be surprised at the carbon build-up in all of the passages, etc, and how much better it will run afterwards.

Check for cracked / dry rotted vacuum lines too while you have it all apart.

I'm actually surprised you were getting the mileage you were (8-12), considering it's a 350, and the weight of the camper.

Jul 22, 2008 | 1999 Chevrolet Silverado 1500

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