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'emission System Requires Service' Warning Message
2012 GMC Sierra 2500
This problem may be covered under warranty. Ask your GMC dealer.
8.0
pretty bad- Typical Repair Cost:
- $7,300
- Average Mileage:
- 66,650 miles
- Total Complaints:
- 4 complaints
Most Common Solutions:
- diesel exhaust fluid tank requires replacement (2 reports)
- basically replaced whole system - still did not work (1 reports)
- not sure (1 reports)
exhaust system problem
Helpful websites
- No one has added a helpful site for this 2012 Sierra 2500 problem yet. Be the first!
A D V E R T I S E M E N T S
I bought this used 2012 GMC 2500 Sierra Denali Diesel December 2021. I didn't drive it 3 months and in April 2022 the diesel exhaust fluid light came on and would not go off after refilling the DEF reservoir. Repair was to put in a new DEF injector, fix broken line. Then drove it until November 2022 when same thing happened all over again. This time, GMC (Clason GMC) replaced almost the entire system, (particulate filter, catalyst, heater (basically replace from the engine to the tail pipe) and it still did NOT work. The light kept coming back on, limiting my speed. Finally took it back to my original place of purchase and they repeatedly called GMC and their parts store; put on a 2nd after market catalyst, light STILL came back on. The final solution was to plug in a 1000.00 part to override the DEF system and it has been working.... 1 week.
One diesel mechanic on record told my other mechanic that the 2012 is the WORST for DEF problems.
Absolutely ridiculous! I didn't buy a diesel to spend 8351.74 on DEF problems.
- Doyle P., La Crosse, WI, US