EGR Codes P0404 and P1404, Oil Level Light Remains on (Reprogram PCM)
| Subject: | EGR Codes P0404 and P1404, Oil Level Light Remains On After Oil Change or Oil Has Been Added (Reprogram PCM) |
| Models: | 1999 Chevrolet and GMC C/K Models (Silverado and Sierra) |
| with 5.3L V8 Engine (VIN T -- RPO LM7) |
| and 4L60-E Automatic Transmission (RPO M30) |
Built Prior to the Following VIN Breakpoints:
Assembly Plant | Division | VIN Breakpoint (Last 8 Digits) |
|---|---|---|
Ft Wayne | Chevrolet | XZ127888 |
Ft Wayne | GMC | XZ508465 |
Oshawa | Chevrolet | X1185223 |
Oshawa | GMC | X1518349 |
Pontiac East | Chevrolet | XE154914 |
Pontiac East | GMC | XE515104 |
Condition
| • | Some customers may comment on a Malfunction Indicator Lamp (MIL) illuminating in cold weather. A Diagnostic Trouble Code (DTC) P0404 or P1404 is stored in the Vehicle Control Module. |
| • | Some customers may also comment of an Oil Level Light illuminating and remaining illuminated during or soon after either an oil change or adding oil. |
Cause
| • | EGR DTC Concern: Rapid cycling of the EGR Valve at ambient temperatures between 1° and 4°C (34 and 39°F). |
| • | Oil Level Light Concern: The Oil Level Light may be illuminated, even though the oil level is correct as measured on the dipstick. This condition may occur if the ignition key is turned on during, or very soon after, an engine oil change or engine oil has been added. |
Correction
| • | For the EGR DTC Concern: |
| Perform the existing diagnostic procedures to verify that the DTC's P0404 and/or P1404 are not the result of an EGR failure, or of a related wiring/other concern. Engines determined to have EGR faults should be repaired, and then have the PCM Reprogrammed only if the new calibration was not previously installed. If the DTC's occur and no EGR fault is found, reprogramming the PCM with the new calibration will be required. |
| • | For Oil Level Light On: |
| Reprogramming the PCM with the new calibration will be required. |
Calibrations
Calibration Number | Engine | Transmission | Fuel/Emissions |
|---|---|---|---|
16263712 | LM7 | M30 | NF2-NN8 (Unleaded Fuel, Federal and Canada) |
16263713 | LM7 | M30 | NN8 (Unleaded Fuel, Non-European Export) |
16263715 | LM7 | M30 | NC1 (Unleaded Fuel, California LEV) |
16263727 | LM7 | M30 | NM2 (Leaded Fuel, Export) |
Parts Information
The listed calibrations are not physical parts and are not available from GMSPO.
The calibrations are available from Techline on 1999 Disk 3 and later CD ROM.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Labor Description | Labor Time |
|---|---|---|
J6355 | PROM, Reprogramming Diagnosis |
0.7 hr 0.0 - 0.7 hr. |
