fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
14,838 miles

About These NHTSA Complaints:

The NHTSA is the US gov't agency tasked with vehicle safety. Complaints can be spread across multiple & redundant categories, & are not organized by problem. See the Back button — blue bar at the very top of the page — to explore more.

Get notified about new defects, investigations, recalls & lawsuits for the 2002 Pontiac Bonneville:

Unsubscribe any time. We don't sell/share your email.

problem #4

Jun 072007

Bonneville 6-cyl

  • Automatic transmission
  • 10,000 miles
1. the transmission on our 2002 Pontiac Bonneville has had problems since purchase new. The dealer eventually sent the car to a local transmission shop but the problem has persisted intermittantly even after many complaints. The transmission slips, shudders on acceleration and shifts erratically. It will slip and then sometimes shift hard. 2. it is very dangerous to drive. The transmission will slip and then shudder as we are pulling into traffic. We have almost been T-boned several times. It has been getting worse lately and I fear that one of these times we will be killed by this proplem. I recently learned that General Motors knew of this problem and actually issued a bulletin #0O-07-30-002B in July of 2002. The dealer should have been aware of this as we reported the exact symptoms to the dealer shortly after purchase. 3. the dealer sent the car to a local transmission repair shop that flushed the transmission and changed the filter. It did not solve the problem and any car with the 4T65E transmission pose a significant threat to the owners of these vehicles and to highway safety as you never know when failure will occur. Each of the dozen or more times we complained to the dealer they claimed that they found no problem codes. GM's internal bulletin suggests that they replace the pressure control solenoid, check line pressure to specifications, check to see if correct electrical signal from PCM is being transmitted and received, access pc solenoid valve control test on the scan tool, and replace valve body. None of these things were done and the transmission has gotten worse creating even more danger. Problem has existed since vehicle was only a few months old.

- North Canton, OH, USA

problem #3

Jun 192004

Bonneville 6-cyl

  • Automatic transmission
  • 49,352 miles
For a short 2-3 wk period I noticed my transmission not performing normally. I observed 4-5 occurences of slow gear shifting in this 3 wk period and promptly scheduled a test of the transmission. The computer test identified an error that was explained as "inaccurate gear ratio", which means the computer told the transmission that car was traveling at inaccurate speeds. Therefore causing the gears to shift inaccurately. I scheduled a follow-up for the next week to leave the car with the repair shop for further, more comprehensive testing. Over that weekend, the car failed to shift into gear for the first time at a major/busy highway intersection. I did not have any gears and had to leave the car in the intersection, cross traffic, and call for assistance.

- Hope, ME, USA

problem #2

Mar 302002


  • miles
I am concerned with the problem GM is having with the 4T65E transmission. The issue dealing with slippage due to a possible failure of an internal component. I have a 2002 Pontiac Bonneville that is driven by my wife. I have been a loyal GM customer and worked through several tsb concerning both our vehicles. I am concerned they fix these as they occur, however when I am at 37,000 miles and out of warranty who pays then? safety is my forst priority! if this were to occur (and GM knows it might) when my wife is passing, pulling into traffice, etc... who knows the outcome. Please consider this issue with the others concerning this and make GM fix a potential problem they are aware of.

- Tampa, FL, USA

problem #1

Sep 022003

(reported on)

Bonneville 6-cyl

  • Automatic transmission
  • miles
The vehicle was shifted from reverse to drive. When the consumer pressed the accelerator the vehicle was still in reverse. The dealer has been contacted.

- Munster, IN, USA