What does code P0410 mean on a GMC and is it safe to drive?
P0410: Secondary Air Injection System Malfunction. Here's what it means on your GMC, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
PowertrainMedium urgency
What this code means
The secondary air injection system, which pumps fresh air into the exhaust on cold starts, is not working correctly.
Common causes for your GMC
- Failed air pump
- Stuck or leaking one-way check valve
- Clogged or rusted air injection pipes
Symptoms
- Check Engine Light
- May fail emissions or show high cold-start emissions
Typical fixes
- Replace secondary air pump
- Replace check valve
- Clean or replace corroded piping
Repair cost range
For a GMC, repairs for P0410 often fall between $250 and $900, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on GMC
GMC P0410 secondary air injection on 5.3L V8 trucks mirrors the Chevrolet Silverado diagnosis. The air pump relay corrodes commonly—test it before pulling the pump. Envoy 4.2L inline-six sees the same pump water ingestion failure as the Trailblazer.
Most commonly affected models
Sierra 5.3L 2001–2007Yukon 5.3L 2000–2006Envoy 4.2L 2002–2009