Question about 2002 Chevrolet TrailBlazer

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I want now were is the egr valve on my chevy trailblazer

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  • Chevrolet Master
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There is no EGR valve on the Trailblazer

Posted on Sep 11, 2010

  • ride2live81 Feb 25, 2011

    Thats odd because you can buy them for chevy trail blazers with vortec engine 4.2. Should be located in front of throttle to the left.

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Code 0172, what am I looking 4 on 4.2 in 05 Chevy Trailblazer EXT?


code P 0172 ( if you are using an OBD-11 scanner ) refers to system too rich bank 1====causes --intake blocked --EVAP canister purge valve ---fuel pressure excessive ---EGR valve ---injector/s-- HO2S ( heated oxygen sensor in the exhaust manifold or pipe before the cay converter)
if the engine is performing well, the the first unit to replace is the HO2S as it controls the air/fuel mixture

Mar 07, 2017 | Cars & Trucks

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Where is the egr on a trail blazer 2002 4.2 l


I can't find any listing showing that this 4.2 6 cylinder engine uses an EGR valve, and I have read chevy owners saying the same thing about this engine. It does have a block off plate, but no valve mounted. If had one it would be bolted to the top passenger side of the engine

Jul 19, 2016 | 2002 Chevrolet TrailBlazer

1 Answer

2001 Chevy Trailblazer lacks power up hills and surges


This could be an egr valve, vacuum leak, timing gear wear, fuel pump, catalytic converter, etc do you get a check engine light?

Mar 19, 2016 | Cars & Trucks

1 Answer

How to replace egr valve


All years of Trailblazers do not have an EGR valve. If you have a Blazer, it's located right in front of the engine on the top.

Jun 27, 2014 | 2002 Chevrolet TrailBlazer

1 Answer

I have two codes on my 2003 chevy trailblazer. p1481b and p1482b


You are haveing a problem with your EGR VALVE the pintle witch is the value that shuts off gas flow between intake manifold and the exhust system the valve it not sealing to seperate the two system You can also check the EGR PISITION SENSOR but the code is not right Most likely you need a new EGR VALVE

Oct 31, 2010 | 2003 GMC Envoy

1 Answer

2002 Chevy Trailblazer 6 cyclinder engine (112,000 miles to date) choking up at idle (not stalling, yet), smell of surpur at tailpipe exhaust, computer code P1345 for the camshaft and chankshaft sensor...


It sounds like your EGR valve needs to be replaced. You can go to any auto parts store and get one. Try replacing spark plugs and plug wires also. If the timing was off it would pick up speed slowly and would vibrate really bad at idle. When you go to accelerate if it doesn't accelerate normally it may be the timing but i highly dought it. Try plugs and wires first. then the EGR valve.

Sep 29, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Running rough check engine light on


cylinder 5 has a dirty or sticking injector. check pvc and egr valve.

May 10, 2009 | 2002 Chevrolet TrailBlazer

2 Answers

I have a 2004 Chevy Trailblazer 4.2 engine, It runs fine at Idol, but on the road it misses real bad, the Check Engine light dosent come on, I changed the Plugs but it didnt help, I thought it might be the...


First thing to try would be spark plug wires. Then your timing, and check for vacuum leaks. ie: broken or loose vacuum lines, loose intake bolts, etc. But it sounds like plug wires.

May 08, 2009 | 2004 Chevrolet TrailBlazer

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