What are the most common Pontiac Grand Prix problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2005 Pontiac Grand Prix has 7 documented issues. The most frequently reported are: Ignition Switch May Slip Out of Run Position (Recall 14V400000), 4T65-E Automatic Transmission Hard Shifting and Failure, 3.8L V6 Intake Manifold Gasket Coolant Leak. Of these, 4 are rated critical and should be addressed promptly.
Is the Pontiac Grand Prix reliable?
The 2005 Pontiac Grand Prix has 7 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 4 issues are rated critical: Ignition Switch May Slip Out of Run Position (Recall 14V400000) and 4T65-E Automatic Transmission Hard Shifting and Failure and 3.8L V6 Intake Manifold Gasket Coolant Leak and Grand Prix 3800 V6 Lower Intake Manifold (LIM) Gasket Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Pontiac Grand Prix problems?
Repair costs for known Pontiac Grand Prix issues range from $100 to $1,200, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2004-2008 Pontiac Grand Prix Ignition Switch May Slip Out of Run Position (Recall 14V400000)?
NHTSA campaign 14V400000 exactly covers 2004-2008 Pontiac Grand Prix vehicles for unintended ignition-key rotation out of RUN caused by key-ring weight, road conditions or another jarring event. The resulting engine shutdown can also prevent air-bag deployment. The campaign-wide… Severity: high.
What is the 2001-2008 Pontiac Grand Prix 4T65-E Automatic Transmission Hard Shifting and Failure?
The exact corpus supports 4T65-E shift and failure conditions throughout the frozen 2001-2008 range, but not one cause. Examples include P0756/P0757 shift faults, P0741/P0742 TCC paths, pressure-control and valve-body work, second-clutch shudder, V8 torque-converter conditions, s… Severity: high.
What is the 1997-2005 Pontiac Grand Prix 3.8L V6 Intake Manifold Gasket Coolant Leak?
The 3.8L (3800) Series II V6 used in many Grand Prix models is prone to upper and lower intake manifold gasket failure, where the gasket degrades near the EGR/coolant passages and leaks coolant. Leaks can be external (visible coolant pooling, low coolant, overheating) or internal… Repairs typically run $947-$1,099. Severity: high.
What is the 1997-2008 Pontiac Grand Prix Grand Prix 3800 V6 Lower Intake Manifold (LIM) Gasket Failure?
1997-2008 Grand Prix with the 3800 V6 (NA L36 or supercharged L67) — same LIM gasket failure mode as Bonneville and Buick variants. Particularly common on the supercharged GTP because higher boost pulls coolant past the eroded gasket faster. Repairs typically run $400-$1,200. Severity: high.
What is the 2001-2005 Pontiac Grand Prix Key Sticks / Won't Turn or Come Out of Ignition?
Owners frequently report the key becoming stuck in the ignition cylinder, unable to be removed or unable to turn to start, due to wear in the ignition lock cylinder and shift-interlock/Park-position issues. This is among the most-reported complaints for the seventh-generation car… Repairs typically run $150-$400. Severity: medium.
What is the 1997-2008 Pontiac Grand Prix HVAC Blower Motor Resistor Failure (Fan Stuck on High / Lost Speeds)?
The blower motor resistor commonly fails, leaving the heater/AC fan working only on the highest setting or losing lower speeds (e.g., 1 and 2 dead while 3-5 work). Contributing factors include cowl water leaks dripping onto the resistor/connector and causing corrosion, and on 200… Repairs typically run $100-$250. Severity: low.
What is the 1997-2008 Pontiac Grand Prix Supercharger Coupler Rattle (GTP / L67 Supercharged 3.8L)?
On supercharged GTP models with the L67 (and the later L32 supercharged 3.8L), the Eaton M90 supercharger develops a noisy front coupler/isolator as the elastomer wears, producing a rattle or knock from the front of the blower. Owners report the rattle can return roughly 10,000 m… Severity: low.
