No-one should trust Wiki.
Many reason why then about above "update" I don't have time to post.
Far worse then other traditional encyclopedias that's has a long history of Bias on many things.
I only use them as starting point to find data for most things or for a quick post to others that give a bare overview of a given topic.
Even ignore the "update" that seems gone now the page has many problems including recall info that whoever wrote it never read TSB for the fire and other recalls send to GM dealer network. All are on Alldata and Alldatadiy to read them for Decades. Most are publish by other sites too and link in my cave too.
Big Example: Only 84
required PH51 then later PH52 because 51 was discontinue/changed by GM w/ calibrated dip stick to minorly increase oil cap. Rest l4 just longer stick to move handle away from exhaust and keep PF47 short filter. Rest can use long filter to make easier to change and some brands only have the long filter.
Using long filter only adds maybe ~ Cup of oil to the system.
Plus Recall Requirement of PH51 is wrong filter for side and top down mounting because doesn't have anti-drainback to keep filter full after shutdown.
Likely was a typo that TSB pushed never fix but most Parts books had 84 needs PH52 soon after.
GM likely discontinued 51 because same as 52 w/ anti-drain just to drop inventory numbers. GM and Contract Manufacturing likely saves 100's of Thousands of $ minimum to drop a number when other number is same plus anti-drain. Likely dropped others too.
A lot of the rest of fire recall are guesses by fool(s) that should not be allowed.
------------------Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)The Ogre's Fiero Cave
[This message has been edited by theogre (edited 02-02-2020).]