How to fix Gm trouble code 21

What is your question?

I got cool 21 on my 1990 Chevy S 10 so I just replace the sensor but it still has the same problem with the Kranks with no start it’s got like extended extended cranking it doesn’t start it sounds like he doesn’t want to no power or something

What makes this problem better or worse?

No but I will say that everything was fine until I change the water pump

How long has your 1990 Chevrolet S10 had this problem?

2 weeks

Visitor

in Lawrenceville GA

Jul 4, 2022

Popular Answer

What are the best Chevrolet repair shops?

RepairPal Certified shops can diagnose and repair your 1990 Chevrolet S10. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

Popular Answer

How to fix Gm trouble code 21

What is your question?

What makes this problem better or worse?

No but I will say that everything was fine until I change the water pump

How long has your 1990 Chevrolet S10 had this problem?

2 weeks

Visitor

in Lawrenceville GA

Jul 4, 2022

1 Reply

Popular Answer

DaveJMon Jul 5, 2022

Stop with the "diagnose by trouble code". A 1990 anything is not really capable of being tested by trouble code. You'll need to find out what's going on with fuel, ignition spark, emissions controls, air to the intake. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops

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Popular Answer

What are the best Chevrolet repair shops?

RepairPal Certified shops can diagnose and repair your 1990 Chevrolet S10. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.