P0087 on GMC
Fuel Rail/System Pressure - Too Low
P0087 on GMC vehicles indicates fuel rail/system pressure - too low. Au7o has documented this code across 4 GMC models — most commonly on Savana, Sierra 2500HD, Sierra 3500HD. This code means the fuel rail or fuel system pressure has dropped below the level the engine's computer expects. The computer monitors a fuel pressure sensor and has seen pressure fall too low, meaning the engine isn't getting enough fuel — especially noticeable under acceleration or load. This is most common on direct-injection and diesel systems that run very high pressures. Symptoms include hard starting, stalling, hesitation, lack of power, and possible limp mode. Typical repair costs on GMC range from $350 to $18,000, depending on the specific model and root cause.
Common Causes of P0087
- •Clogged or dirty fuel filter
- •Weak or failing fuel pump (lift pump or high-pressure pump)
- •Faulty fuel pressure regulator or control valve
- •Restricted or leaking fuel lines
- •Faulty fuel pressure sensor
- •Air in the fuel system or running low on fuel
- •Worn high-pressure pump (direct injection/diesel)
P0087 on GMC by Model
GMC Savana(1 issue)
- Fuel Pump Module Failure and Hard Start / Stalling2003-2020
The GMC Savana (and Chevrolet Express) fuel pump module is known for premature failure between 80,000-140,000 miles, often stranding drivers without warning. The in-tank electric fuel pump motor burns out or the sending unit becomes erratic. Running the tank consistently below 1/4 generates heat that shortens pump life. Commercial use Savanas that frequently run low on fuel — common in fleet operations — see pump failures well before 80,000 miles. The fuel pump is a demanding repair requiring tank removal on the Savana.
GMC Sierra 2500HD(1 issue)
- CP4.2 High-Pressure Fuel Pump Catastrophic Failure2011-2020
The Bosch CP4.2 high-pressure fuel injection pump used on the 2011-2016 LML and 2017-2020 L5P Duramax diesel engines is prone to catastrophic failure that destroys the entire fuel injection system. Unlike its predecessor the CP3, the CP4.2 lacks a roller element and relies solely on fuel for lubrication. When metal fatigue occurs, the pump shatters and sends metal debris throughout the entire high-pressure fuel system — contaminating all six injectors, the fuel rails, return lines, and feed lines. Total repair cost runs $8,000-18,000. A class action lawsuit was filed against GM. The same pump also fails in Ford 6.7 Power Stroke and Ram 6.7 Cummins of the same era.
GMC Sierra 3500HD(1 issue)
- CP4.2 High-Pressure Fuel Pump Catastrophic Failure2011-2020
The Sierra 3500HD Duramax diesel uses the same Bosch CP4.2 high-pressure fuel pump as the 2500HD. The pump is prone to catastrophic failure that destroys the entire fuel injection system (all 6 injectors, fuel rails, return lines). The 3500HD is often used for heavier towing and work applications, which places more sustained load on the high-pressure fuel system and may accelerate CP4.2 wear. Total system replacement costs $10,000-18,000. A CP3 conversion kit (Fleece FPE-CP3K-LML or FPE-CP3K-L5P) is strongly recommended as a preventive upgrade on any high-mileage Sierra 3500HD Duramax.
GMC Terrain(1 issue)
- High-Pressure Fuel Pump Failure Causing Engine Stall (Recall)2021-2023
On 1.5L turbo Terrains, a component inside the high-pressure fuel pump can fracture prematurely, generating metallic debris that migrates through the fuel line and blocks the injector inlets, starving the engine of fuel and causing sudden stalling and loss of power while driving - a crash risk. GM recall N222372310 (NHTSA 23V-013) covers the 2022 Terrain; broader inadequate-fuel-flow actions span the 2021-2023 range.
Looking for P0087 on a different make?
View P0087 across all makes →Frequently Asked Questions
What does P0087 mean on GMC?▼
P0087 stands for "Fuel Rail/System Pressure - Too Low." This code means the fuel rail or fuel system pressure has dropped below the level the engine's computer expects. The computer monitors a fuel pressure sensor and has seen pressure fall too low, meaning the engine isn't getting enough fuel — especially noticeable under acceleration or load. This is most common on direct-injection and diesel systems that run very high pressures. Symptoms include hard starting, stalling, hesitation, lack of power, and possible limp mode. On GMC specifically, this code is documented across 4 models.
What causes P0087 on GMC vehicles?▼
Common causes on GMC: Clogged or dirty fuel filter, Weak or failing fuel pump (lift pump or high-pressure pump), Faulty fuel pressure regulator or control valve, Restricted or leaking fuel lines, Faulty fuel pressure sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0087 on a GMC?▼
Repair costs on GMC range from $350 to $18,000, depending on the specific model and root cause.
Which GMC models have P0087 documented?▼
Au7o has documented P0087 on 4 GMC models: Savana, Sierra 2500HD, Sierra 3500HD, Terrain.