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Pontiac Trans Sport was created in 1990.
(4.3L) 4.5 quarts oil and filter change.
185 hp
It's concealed in the roof
The horn is under the left head light .
under the floor mat on the passenger side
If an automatic transmission ,broken bands in the tranny.
On the lower driver side of the radiator!
Wiring for 91 Pontiac Transport: http://www.auto-olds.ru/PONTIAC%20TRANS%20SPORT%201991.pdf
I dont understand your question.
on top of oil filter housing
1-6-5-4-3-2