I had expensive gm replacement fuel pump in my Colorado truck early this year, warranty is up on pump, catalitic converter which is built on to exhaust replaced 3 years. Ago, the catalitic converter is bad with check engine lite on for months, but runs fine. Was told may or may not ever clog. For quite awhile I hear tick noise when running an if get out an listen underneath , that sounds like exhaust noise. Could that noise be converter or newer fuel pump ? Not sure how long been go on , pickup just turn over 200 k miles but exellent runner or performance wise , not sure what kinds noise either thing mention makes, I watch u tubes of it

yep

Cracked exhaust manifold? Is is louder at start up and gets a little better when it warms up?

Im never buying Chevy Colorado

I don’t think it would be the fuel pump. Could be a loose exhaust bracket or a hole in the exhaust. Hard to say without hearing it.

Yep..Exhaust Gasket (s)..no biggie..happens all the time..Not sure what it would do to the valves (Intake or exhaust) if you don't fix it..hope this helps

Not sure. I have start listen an go for short drive soon. Don't sound like cracked exhaust manifold as was replaced 3 years ago, I rember that, loud at start up an then quieter. Cracked exhaust manifold is deadly, comes right though the air vents interior. Though firewall an dash. They put new exhaust manifold in to, a steady not resl loud but noticeable tick tick , like exhaust, that why thinking converter. They reset the check engine lite in shop awhile ago an came back on like they say. A few days later

Roll the Window down a bit,turn the radio up and put electrical tape over the light.

I just went for drive, definately exhaust noise. Same always. Maybe converter noise go though exhaust, I not go worry about it, not bad, hopefully never clog in converter

Good plan

Yep..That's maybe why your light's on..It's detecting a sensor in the exhaust system malfunction..If the systems are not working properly probably ends up burning more fuel than needed..no big deal..

Its a chevy thing, i think they have the most sensitive check engine light going. Lol i bought a chevy blazer once that was told the fuel pump is going out, and the injectors were plugged up. I got it cheap, and a mechanic friend said put 10 gallons of 91 octane gas and 2 cans of seafoam in it, and drive the 4ell out of it. And it came out of it, did need a fuel pump about 50,000 miles later. You can get by a few times just kick the fuel tank, and they start. Was the best 500.00 dollars i ever spent lol.

If the exhaust leak is up front, it's probably a cracked manifold or it broke a bolt or two. Broke exhaust bolts are real common now-a-days.

It sounds like steady noise by muffler,.but not loud , not notice until listen underneath, same warm or cold engine, it got get worse or I guess do nothing, it may not

Back that far you probably have a rust hole in the pipe or muffler.

Roll in under and have a look, you should be able to see it. Feel on the top side too.

That's y u should never by vehicel wit a bowtie.. Bearimgs goin out on catalytick convertor!!! Nown fer it

A point of interest to you Coonman and maybe others. I have an acquaintance who works for gm as an engineer and I complained to him one time about the short life of fuel pumps in my GMs. He asked if I ran with low fuel a lot, guilty, and then he told me the more you keep that pump submerged thru it's life the longer it will last. Don't leave it low. Sorry if I'm redundant.

Osky

Yep.....^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I have heard that also from many different people and shops..It's about having cover over the fuel pump..the fuel acts as an exchanger and removes heat away from the pump..thus creating a longer life of fuel pump

Don't forget to check your blinker fluid.

Yep, the fuel cools them.