Jump to content

service engine light

2000LTZ71

Recommended Posts

2000LTZ71 Enthusiast

2000LTZ71

Posted
Posted

Hey guys,

 

I have a question. last thursday I got into my truck in the morning and drove to work and nothing was wrong, at lunch I go out to the truck and start it up and the Serive Engine light came on. Stayed on for a couple days and then one morning I go out to take a ride and the light was off again. what would cause this light to come on for a few days and then just go away again?

 

thanks in advance

MarkD Senior Enthusiast

MarkD

Posted
Posted

It could be many, many things.  Did any other lights come on?  Notice any problems?  Spark knock?

 

If it went off, I wouldn't worry about it.  Are you still under warranty?

2000LTZ71 Enthusiast

2000LTZ71

Posted
  • Author
Posted

No driving problems at all and no other lights came on. I do have a warrantee but it's an extended warrantee that I bought when I bought the truck. Not sure what it covers really. I have to check that out. I'm not going to worry about it until it happens again though.

TomEllis Enthusiast

TomEllis

Posted
Posted

Here's a wild question, did you just fill up with gas the day the light came on? and then fill up again later and it went off?

There is a sensor in the gas fill tube that senses if the cap is not put on tight and it will turn on the service light. Make sure that you put the cap on tight and make it click a few times after.

besides that I do not have another answer.

Tom

Roofer Senior Enthusiast

Roofer

Posted
Posted

I had the same happen to me. I figure it was a batch of bad gas. It hasn't come on since I got gas at a different station. In the owners manual it states a few different possibilities. Bad gas and the gas cap not being on tight are two of them.

Tobes Enthusiast

Tobes

Posted
Posted

yeah....that light normally has to do with the emissions system.  Could have been bad gas or even a gas cap that was not tight.  Todays tanks like to keep a slight positive pressure.  I guess that keeps the fumes from getting out....I might be totally off, but that is what I heard.....As long as it went off it should be OK

THE BIGPUNN Enthusiast

THE BIGPUNN

Posted
Posted

my understanding with the gas cap, is that the fuel system is under pressure. the cap being loose or engine running during fill up can cause the light to come on indicating the cpu is senses a problem and is adjusting for compression or pressure trouble. the light will come on for an many different problems. cpu can get used to one brand of fuel and the light can go off indicating a spark knock during the cpu adjusting for a new gas. even driving on "e" can cause the light to come on! if the light went out no foul. sometimes taking off the neg battery cable for a while will reset the cpu and cause the light to go out.

2000LTZ71 Enthusiast

2000LTZ71

Posted
  • Author
Posted

That's good to know, I have fueled up before with the Truck running. I guess I won't do that anymore, it's safer that way anyway. Thanks guys for all your Reply's.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • GAMark
      Road Master Active Suspension

      By GAMark · Posted

      Not true! I have been runing them since 2006 F250! suspension component that works as a sway bar, a traction bar, and a helper spring points directly to the RoadActive Suspension (RAS) kit. Works as a sway bar, a traction bar, and a helper spring.
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      Here's a starter kit:    CC Jensen, a Danish oil testing Concern gives us the following guidelines:   ISO 14/12/10 Very Clean Oil ISO 16/14/11 Clean Oil ISO 17/15/12 Lightly Contaminated ISO 19/17/14 New Oil ISO 22/20/17 Very Contaminated and not suitable for any service.   In addition CC Jensen gives a table showing how engine life is increased by cleaning up the oil. For example cleaning the oil from 19/17/14 to 13/11/8 will extend motor life by a factor of 6X.   But even cleaning it two “Life Extension Classes” will double motor life. So perhaps giving those classes would be useful:   21/19/16 20/18/15 19/17/14 18/16/13 17/15/12 16/14/11 15/13/10 14/12/9 13/11/8   *************************************   https://testoil.com/program-management/setting-iso-cleanliness-targets/   Third paragraph from the bottom will give a starting point.    Your next question should be, okay 10um at what Beta ratio and the answer is in the graph Beta 75.   Then the next question is what is your chosen filters profile? (Purolator PL series below) The red dot is Beta 75. This was the information I obtained from MANN a few years ago. So the best filters, Purolator One, AMSOIL EA, FRAM Ultra, Royal Purple, Bosch Premium should get a doubling engine life over filters like Purolator L, any service filter from any quick lube, WIX, NAPA, STP, Mobil 1, Purolator BOSS.    And as noted by CC Jensen a 2-5 micron @ Beta 200 bypass system has the capability of a six fold improvement. AMSOIL has such a system as does Donaldson.       Now having said all that testing is the touchstone. Test the oil NEW and test it with your chosen filter. Then test over milage. Do the work, get the result. But understand this in NOT absolute BECAUSE this is one factor in isolation.   Example:    A valve spring supplier can state that with cam X and a valve train of Y grams the valves will not float to 7K rpm. is that true if the builder choose a system 20 grams over limit? Common sense must be used and limits understood. 
    • bruceb58
      Road Master Active Suspension

      By bruceb58 · Posted

      This doesn't look like a GM truck. Not needed on a HD truck
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      It varies a ton around me. Some places are still at $5.00 or higher and others are way down into the $4's.   Offroad diesel was $4.02 at the one station I passed today.
    • Hdwrguy
      2027 Chevrolet Silverado: Official Discussion

      By Hdwrguy · Posted

      So after reading the reveal from Chevrolet, I kept asking myself...why did the trim levels change?   Here are the official ones:   Work Truck (WT): The quintessential fleet truck, built with durable, easy-to-clean interiors for commercial or utilitarian use. Custom: A stylish, road-oriented trim that adds a more refined appearance, standard dual exhaust, and modern exterior styling. Custom Trail Boss: An entry-level off-roader featuring a 2-inch factory suspension lift and 34-inch mud-terrain tires on a budget. Silverado: Serving as the new base consumer truck (replacing the previous LT trim), it comes standard with the Z71 off-road package when equipped with 4WD. Trail Boss: Steps up the off-road hardware with the 2-inch lift, 34-inch tires, monotube shocks, an exclusive off-road hood, and more premium interior options. ZR2: The flagship off-roader. It boasts 35-inch mud-terrain tires, Multimatic DSSV dampers, front and rear electronic lockers, forged carbon-fiber interior accents, and an available hardcore Bison Edition (co-developed with AEV). High Country: The pinnacle of luxury. It replaces bright chrome with modern satin chrome, 22-inch wheels, premium leather, real wood interior trim, a panoramic sunroof, and an exclusive front-passenger touchscreen. As others have stated, why would you want a Silverado - 'Silverado' - wth?? LT needs to remain!!!   Also, there will no longer be a dedicated Z71 model.  All 4x4 trucks will have the Z71 package. Carplay is also something that cannot be removed.  Hopefully it will remain.     I am excited about the 5.7L V8 (350 C.I.D.)  Old school Chevy power.  My only concern is whatever version of AFM/DFM cylinder deactivation.  Too bad that isn't an option a buyer can choose to have or not.   I will definitely be stopping by my local dealership when these trucks start showing up.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...