Exhaust System - Sulfur Odor
Number 87-6 (Gasoline)-45 Date 6/87Subject: EXHAUST SULFUR ODOR
SOME 1986 AND EARLY 1987 GRAND AM AND BONNEVILLE MODELS WITH 3.0L AND 3.8L ENGINES (VIN CODES L AND 3)
Some 1986 and early built 1987 models equipped with 3.0L or 3.8L engines and built prior to certain Vehicle Identification Number break points may exhibit an occasional condition of a sulfur smell from the exhaust. This condition is more prevalent in city traffic or upon coming to a stop, and does not appear to affect fuel economy, driveability or emissions; however, in some cases, it may be a customer annoyance.
While high sulfur content fuels and rich air/fuel ratios both contribute to this condition, it may also be caused by a catalytic converter with reduced nickel levels in the base metal.
If this condition is experienced and cannot be repaired using currently published diagnostic and service information, it may be necessary to replace the catalytic converter with one of the applicable part numbers listed below.
VEHICLES INVOLVED:
Certain 1986 and early built 1987 vehicles within the following serial numbers:
86 and 87 Models
Model Thru VIN Number Service Part Number
3.0L Grand Am HC799857 25103328
3.8L Bonneville HW221690 25103335
WARRANTY INFORMATION:
Labor Operation: T5141
Labor Hours : Use applicable time in Labor Time Guide
Trouble Code : 92