1988 Bonneville
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Posts like a Ricer Type-R
Joined: Aug 2002
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1988 Bonneville
Is the following correct?
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Bonneville LE, SE, SSE
For 1988, the body stayed the same, however, the base model of Bonneville
was replaced by the LE, and the SE and SSE levels of trim were added.
2 Engines were offered in 1988. Beats the hell outof me which went into which models, but I’ll bet the LN3 came out late in the model year and was carried over to 1989. These engines were:
3.8 HO SFI V6 Vin#3 150 Hp @ 4400rpms 210ftlbs @ 2800rpms (LG3)
3.8 (3800) MFI Series I Vin#C 165 Hp @ 4400rpms 220ftlbs @ 2800rpms (LN3)
The LN3 engine became the first to be known as the “3800”
The transaxle in 1988 for all models was the GM 440T4, also known as the 4T60.
No supercharged models offered.
__________________________________________________ ______________
In addition to this information, I need a description of the exhaust, including EGR, O2 sensor(*), muffler outlet type, and resonator (if used). Can anyone help out?
Available final drive ratios for the transaxle would help, too.
__________________________________________________ _______________
Bonneville LE, SE, SSE
For 1988, the body stayed the same, however, the base model of Bonneville
was replaced by the LE, and the SE and SSE levels of trim were added.
2 Engines were offered in 1988. Beats the hell outof me which went into which models, but I’ll bet the LN3 came out late in the model year and was carried over to 1989. These engines were:
3.8 HO SFI V6 Vin#3 150 Hp @ 4400rpms 210ftlbs @ 2800rpms (LG3)
3.8 (3800) MFI Series I Vin#C 165 Hp @ 4400rpms 220ftlbs @ 2800rpms (LN3)
The LN3 engine became the first to be known as the “3800”
The transaxle in 1988 for all models was the GM 440T4, also known as the 4T60.
No supercharged models offered.
__________________________________________________ ______________
In addition to this information, I need a description of the exhaust, including EGR, O2 sensor(*), muffler outlet type, and resonator (if used). Can anyone help out?
Available final drive ratios for the transaxle would help, too.
Senior Member
True Car Nut
Joined: May 2002
Posts: 2,621
Likes: 0
From: Edmonton, AB Canada
In CDN GM There TWO Final Drive Ratios offered on the ME9 Trans only. But there was 2 different differentials used too in 88 (1st & 2nd Designs). THe CDN GM Database only showed 1 trans for 87 - 91 though! 
Note: Chiltons covers more than just the Bonneville in that repair manual! It covers ALL H Bodies made by GM. That'* why it will also say that there was 2 engines available too, the 3.8 - C & 3800 - 3 engines!
Note: Chiltons covers more than just the Bonneville in that repair manual! It covers ALL H Bodies made by GM. That'* why it will also say that there was 2 engines available too, the 3.8 - C & 3800 - 3 engines!