Eldorado — E-body (1986–1991)

Wikipedia's Eldorado article names the HT-4100 V8 for 1986–1987 in the eleventh-generation infobox, and its Cadillac High Technology engine article gives LT8 as the HT-4100's option code and lists the Eldorado (the two articles are one source); no Buick or Oldsmobile E-body used this engine, so there is no sibling source

Wikipedia's Eldorado article names the L26 4.9L V8 as the 1991 engine and says 1991 brought Cadillac's 4.9 liter port fuel injection V8, and its Cadillac High Technology engine article lists the Eldorado under L26 (the two articles are one source); decoderpo.com's GM-wide dictionary reads L26 as the 4.9L (4.9B) V8 with multiport fuel injection but names no vehicle or year (it also prints a second, 3.8L V6 sequential fuel injection reading for L26, which is no Cadillac meaning), so it checks the meaning only; no Cadillac-specific source prints the code beyond Wikipedia