# P1870 on the 2000 GMC Sierra

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name P1870

- [10010185](https://open.wenmarpro.com/bulletins/10010185), 2004-11-05: 00\-01 4L80\-E AUTOMATIC TRANSMISSION MAY EXPERIENCE A HARSH TCC APPLY AND/OR DIAGNOSTIC TROUBLE CODE P1870 OR P074. \*TC
- [10009392](https://open.wenmarpro.com/bulletins/10009392), 2004-09-28: HARSH TCC APPLY AND OR A DIAGNOSTIC TROUBLE CODE P1870. 4L80E AUTOMATIC TRANSMISSION. \*TT