8th digit a W
#11
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x...I've seen several trucks with an x on the 8th digit too. They are also 4.3s.
here is an example I found on ebay... http://cgi.ebay.com/ebaymotors/ws/eB...category=13487
Its got bags![Mr. Cool](https://www.performancetrucks.net/forums/images/smilies/LS1Tech/gr_cool.gif)
SLA
here is an example I found on ebay... http://cgi.ebay.com/ebaymotors/ws/eB...category=13487
Its got bags
![Mr. Cool](https://www.performancetrucks.net/forums/images/smilies/LS1Tech/gr_cool.gif)
SLA
![Burnout](https://www.performancetrucks.net/forums/images/smilies/LS1Tech/gr_burnout.gif)
#12
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In '03 GM switched the L35 4.3 VIN designation to "X" in all models (S-Series, FS, etc.). Something about the FI system being changed slightly. Same HP/TQ ratings as previous "W" motors.
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