P1876 on GMC
Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Failure
P1876 on GMC vehicles indicates transmission transfer case 2-wheel drive solenoid circuit failure. Au7o has documented this code across 1 GMC model — most commonly on Terrain. A Ford manufacturer-specific powertrain code. The PCM or transfer case control module detected an electrical fault — open, short, or out-of-range resistance — in the circuit for the electric-shift transfer case 2WD solenoid, which is mounted on the transfer case and engages or disengages 4WD when the dash selector is turned. The system typically defaults to a fail-safe state with a Service 4WD or 4x4 light on, and the transfer case may refuse to shift out of its current range. The vehicle still drives. Typical repair costs on GMC range from $150 to $1,500, depending on the specific model and root cause.
Common Causes of P1876
- •Failed transfer case 2WD shift solenoid / electric shift motor assembly
- •Damaged, chafed, or corroded wiring and connectors at the transfer case (exposed under the vehicle)
- •Corroded or failed 4x4 shift motor relays — an inexpensive item worth testing before the motor
- •Poor ground or high resistance in the transfer case control circuit
- •Failed transfer case control module or PCM driver circuit
- •Internal mechanical binding in the transfer case preventing the shift from completing
P1876 on GMC by Model
GMC Terrain(1 issue)
- Electronic Shifter Fault - Vehicle Stuck in Park / "Shift to Park" Message2018-2022
Second-generation Terrains with the electronic precision (push-button/monostable) shifter throw a persistent "Shift to Park" warning and refuse to shift out of (or fully into) park even when correctly positioned. GM traced it to build-up/contamination on the Park switch contacts in the transmission control (shifter) assembly, causing high resistance so the BCM cannot electronically confirm the Park position. It can strand the vehicle and, in many cases, keeps the ignition from turning off (stuck in Accessory).
Looking for P1876 on a different make?
View P1876 across all makes →Frequently Asked Questions
What does P1876 mean on GMC?▼
P1876 stands for "Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Failure." A Ford manufacturer-specific powertrain code. The PCM or transfer case control module detected an electrical fault — open, short, or out-of-range resistance — in the circuit for the electric-shift transfer case 2WD solenoid, which is mounted on the transfer case and engages or disengages 4WD when the dash selector is turned. The system typically defaults to a fail-safe state with a Service 4WD or 4x4 light on, and the transfer case may refuse to shift out of its current range. The vehicle still drives. On GMC specifically, this code is documented across 1 model.
What causes P1876 on GMC vehicles?▼
Common causes on GMC: Failed transfer case 2WD shift solenoid / electric shift motor assembly, Damaged, chafed, or corroded wiring and connectors at the transfer case (exposed under the vehicle), Corroded or failed 4x4 shift motor relays — an inexpensive item worth testing before the motor, Poor ground or high resistance in the transfer case control circuit, Failed transfer case control module or PCM driver circuit. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1876 on a GMC?▼
Repair costs on GMC range from $150 to $1,500, depending on the specific model and root cause.
Which GMC models have P1876 documented?▼
Au7o has documented P1876 on 1 GMC model: Terrain.